query: when did yamaha start fuel injection on dirt bikes

pos: Yamaha YZ450F to mid-RPMs. 2008-2009 furthered pushed the powerband to mid-RPMs. September 8, 2009, Yamaha introduced its all-new YZ450F with fuel injection. The engine cylinder is rearward slanted, the crank rod angle has been changed to provide a more complete combustion, the 5-valve head is now a 4-valve head, the gas tank is located under the seat, the exhaust pipe exits the rear of the cylinder, and the air intake is now in the front of the bike. They have a new bi-lateral frame which allows for new improved steering and the new engine components. The entire package comes together to create

neg: Yamaha IT175 Yamaha IT175 Yamaha IT175 belongs to the 'International Trial' family of motorcycles, produced during the 1970s and 1980s. The machine is derived from the Yamaha YZ range of competition motocross bikes with modifications for use in competition enduro, hare and hounds and trail riding. The bike uses an air cooled, two stroke, single cylinder engine with pre-mixed fuel. It is kick start only. There are three derivations of the machine for the global market. A US & Canada market version, a European version and an Oceanic version for other world markets. The IT bikes were designed and sold as enduros

neg: Dual-sport motorcycle manufacturers such as KTM and Husqvarna. Other manufacturers start with a clean sheet of paper and design a new model designed for a specific combination of dirt and street use. These motorcycles are usually heavier and more durable than the models derived from off-road motorcycles. This approach is currently taken by Aprilia, BMW, Honda, Suzuki, Yamaha and Kawasaki. Several manufacturers modify street motorcycles to make them more dirt worthy. These bikes are usually more at home on pavement. Finally, owners add street-legal equipment to off-road bikes. In the US, some states license only motorcycles that meet emissions requirements. Dual-sports may

neg: Yamaha Zuma 125 styled halogen lights. It is intended as a street-bike, with the capacity for handling light off-road conditions such as unpaved roads. Many of the design components like the steel frame, wide tires, oiled-type air filters, robust shocks, and front/rear off-road-style brush deflectors were included to facilitate both riding conditions. The engine is a 123 cc 4-stroke SOHC 4-valve with 10:1 compression. The fuel injection system is similar to the ones installed on most Yamaha bikes, and uses a 24mm injector. The exhaust manifold comes equipped with an O2 sensor. The rated power output is close to . After the break

neg: Yamaha Lagenda model is only available in blue and has exactly the same engine specification as the Lagenda Z. Lagenda 115Z - (2010-2013) The Lagenda 115Z uses a completely redesigned engine with larger 62 mm journal bearings that limits the engine speed, resulting in slightly lower power output. <br> Lagenda 115ZR - (2010-2013) Yamaha Lagenda 115Z Fuel Injection - (2013-present) The 2013 Yamaha Lagenda 115Z Fuel Injection uses a completely new 113.7 cc fuel-injected engine that offers 20% improvement over the older engine in terms of power and fuel economy. The Malaysian model uses the same design as the Indonesian 2013 Yamaha

neg: KTM 950 Super Enduro R as opposed to electronic fuel injection, it also lacks ABS, traction control, a fuel gauge or a tachometer. Its dual silencers are upswept, with the front cylinder’s exhaust header routed beside the engine, in the manner of smaller enduro and dirt bikes. The one-piece plastic fuel tank is of relatively low capacity and the seat is very tall at 920mm (36.22 inches). With its six-speed transmission and stock wheels, the 950SE is capable of speeds in excess of 190km/h (118mph). The 950SE is popularly acclaimed to be one of the most powerful, and “intense” enduro motorcycles ever introduced. Yet in

neg: Yamaha GTS1000 Yamaha GTS1000 The Yamaha GTS1000 is a sport-touring motorcycle introduced by Yamaha in 1993, sold until 1994 in the United States, and sold elsewhere until 1999. It is notable for its forkless front suspension, specifically a RADD, Inc., front suspension designed by James Parker. This suspension provided improved stability under braking, but the improvement did not justify the additional cost for the consumer, and the bike was not commercially successful. The GTS1000 also had advanced technologies not normally found on motorcycles at the time, such as electronic fuel injection, ABS brakes, and a catalytic converter. The engine was taken from

neg: Yamaha YZR-M1 during the season, with adjustment of the engine mounting position and change in the fuel tank shape. The M1 was test-ridden and developed by Max Biaggi, John Kocinski, Norihiko Fujiwara and Kyoji Namba throughout 2001. It was raced in the 2002 season by Biaggi and Carlos Checa on the factory team, and towards the end of the season M1s were also provided to Norifumi Abe, Olivier Jacque and Shinya Nakano. Biaggi achieved two wins and placed second in the final standings as did Yamaha in the manufacturers' championship. In 2003, the engine went from carburetion to fuel injection, and the

neg: Yamaha WR450F red sticker bikes in California. For 2007, the WR gained an aluminum frame dropping the weight from 249 to 246 pounds. In addition to the aluminum frame, the 2007 WR450F saw a revised dry-sump engine, with a new balancer, cylinder head, and camshafts with less lift and duration than previous generations and restyled plastics. 2009 saw new graphics, and 2010 was not sold in the US. After 3 years of design, the all-new 2012 WR450F was released and featured a 2012 YZ250F frame, KYB SSS forks, fuel injection, and an altered motor position. Per Yamaha's designers, the only modifications required

neg: Honda CRF series have electric start, but are still considered race bikes, albeit for off-road rather than motocross. Differences from the R models include lighting, electric start, suspension settings, engine and exhaust tuning for more low-end torque, larger fuel tanks, and a more rugged widespread ratio transmission. Robby Bell won the San Felipe 250 in 2006, 2007 and 2008. CRF-L In 2008, the CRF230L was introduced as an entry-level dual-purpose motorcycle. It was discontinued, several years later, with the introduction of a completely redesigned dual-purpose motorcycle. Being a dual-sport motorbike, these bikes are street legal from the factory, but still have a dirt-oriented

neg: Yamaha TDM850 previous 360 engine Yamaha released the Mk II TDM with updated bodywork and a 270° firing order engine that was shared with the TRX850, they also shared the same transmission. This new engine was first seen in 1995, when Yamaha introduced its TRX850 in Japan. In 2001 the Successor arrived, the TDM 900, with new bodywork, a diamond-shaped alloy frame, a 6-speed gearbox, fuel-injection, R1 derived brakes, a reduced dry weight of 190 kg, a larger-capacity 900cc engine, and slightly wider tyres (160 rear, 120 front). It has a 2-position trip meter, a digital clock, and digital fuel meter. ABS

neg: Yamaha RS-100T also produces the fuel-injected 83cc model known as Yamha. By 2004, the RS-100T was succeeded by a more efficient and environmentally friendly Yamaha STX four-stroke motorcycle. In addition, the 150cc model includes a key slot cover for better protection against theft. Starting from 2007, the Yamaha STX in Philippines began using fuel injection system to replace the carburetors used by most of the Yamaha series. Most tricycle drivers afford Yamaha RS-100T nowadays, Yamaha RS-100T produced more than 2,000,000 motorcycles in the world especially in the Philippines. Since 1980, the Yamaha RS-100T was introduced starting P30,000 ($640) until the year mid

neg: Yamaha TDM 900 torque @ 7,500 rpm). In combination with fuel injection the new engine pulls TDM much stronger. It is a pleasure to accelerate out of tiny hairpin corners and feel the mighty twin's power resulting in forward propulsion. In the past TDM riders commented that the gearbox was a bit loud and harsh. That has been taken seriously and a totally new, 6 speed gearbox has been developed. It shifts smoothly and when in last gear, the bike runs on lower rpm and higher speed comfortably on highway sections. Innovation: adjustable air induct and fuel injection strengthen the parallel twin character

neg: Yamaha Zuma 125 in period, the Zuma 125 can achieve a maximum speed of around . This same engine (minus the fuel injection) is also used in Yamaha's Cygnus-X scooter. There is currently an established aftermarket with numerous parts that allow the engine to be enlarged up to 287 cc. Depending on driving style and riding conditions, the Zuma 125's fuel economy is around . Yamaha Zuma 125 The Yamaha Zuma 125 is a scooter introduced by Yamaha Motor Company in September 2008. It is a 125 cc version of its smaller 49cc cousin, the Zuma. Outside the United States it is known

neg: Rajdoot 350 poor availability of expensive spare parts and lack of trained service personnel did not help either. After the runaway success of its smaller stablemate Yamaha RX 100 introduced in 1985, the Rajdoot 350 stayed in production as a flagship model, and production ended in 1990. The last bikes were reported to be sold in 1991. The Yamaha RD350B was substantially modified before it was produced in India as the Rajdoot 350. The engine was detuned, the carburettors were rejetted for fuel economy rather than performance, the front disc brake was substituted for a cheaper 180 mm TLS drum brake, the

neg: J. B. Gunn acquired a Ducati 750 Imola Desmo which he raced successfully through 1990. In 1991 he bought a 1990 Ducati 888 SP2. With its electronic ignition and electronic fuel injection, this brought his professional expertise to the race track. He was one of the first privateers with his own chip writer. In parallel with racing modern bikes, he also raced vintage bikes, mostly English and Italian bikes from the 1950s and 1960s. He raced both new and old bikes through 2000, saying "I’ll keep at it as long as it is fun". Regretting the bikes he sold when he left England,

neg: Yamaha YZ125 Yamaha YZ125 The Yamaha YZ125 is a motorcycle with a 124.9 cc two-stroke engine designed for motocross riding and produced by Yamaha Motor Company. It was first produced in 1974 and for the first year was made with dual rear shocks (Thermalflow shocks) and in 1975 released its first monoshock design the YZ125C and has continued production with a new model being produced every year to date. The YZ 125's produced from 1996 to 2002 are considered by some to be the best dirt bikes ever, due to its wide powerband and excellent handling. The YZ125 has been ridden to

neg: Yamaha Motor Company (and later 850) a 750cc triple cylinder machine with shaft final drive was introduced almost seven years after Honda's breakthrough bike. Yamaha's first four-cylinder model, the XS-1100 followed in 1978, again with shaft drive. Despite being heavier and more touring oriented than its rivals it produced an impressive string of victories in endurance racing. The 1970s also saw some of the first dedicated off-road bikes for off-road racing and recreation. Yamaha was an early innovator in dirt-bike technology, and introduced the first single-shock rear suspension, the trademarked "Monoshock" of 1973. It appeared in production on the 1974 Yamaha YZ-250, a

neg: Yamaha FZ6 half-fairing, upright seating position, and underseat exhaust. These features position it between a full supersport and a naked streetfighter (although in Europe and Australia, there is an available naked FZ6N option). The FZ6 in 2006 has a revised engine, frame, subframe, grabhandle, rear swingarm and wheels are painted in black. It had a metal honeycomb type catalytic converter satisfies EU2 and CARB emissions standards, and optimized fuel injection (FI) system mapping to increase torque at lower engine speeds. In October 2006, Yamaha announced an updated FZ6 for the 2007 model year. The FZ6 received optimized fuel injection (FI) system mapping,

neg: Two-stroke engine regulation of air pollution. Eastern Bloc countries continued until around 1991, with the Trabant and Wartburg in East Germany. Two-stroke engines are still found in a variety of small propulsion applications, such as outboard motors, high-performance, small-capacity motorcycles, mopeds, and dirt bikes, underbones, scooters, tuk-tuks, snowmobiles, karts, ultralight airplanes, and model airplanes and other model vehicles. They are also common in power tools used outdoors, such as lawn mowers, chainsaws, and weed-wackers. With direct fuel injection and a sump-based lubrication system, a two-stroke engine produces air pollution no worse than a four-stroke, and it can achieve higher thermodynamic efficiency. Therefore,

neg: Diesel engine a diesel fire can be fierce. Fuel contaminants such as dirt and water are often more problematic in diesel engines than in petrol engines. Water can cause serious damage, due to corrosion, to the injection pump and injectors; and dirt, even very fine particulate matter, can damage the injection pumps due to the close tolerances that the pumps are machined to. All diesel engines will have a fuel filter (usually much finer than a filter on a petrol engine), and a water trap. The water trap (which is sometimes part of the fuel filter) often has a float connected to

neg: Honda CR series 1974 and 1975 the CR250M design changed little, giving the advantage to Suzuki and Yamaha whose dirt bikes came to be seen as superior to the Honda. In 1978 Honda released its newer version of the CR250M. They renamed the bike the CR250R (the "R" in the name stood for "race"). The fire engine red bike attracted a good deal of attention. In 1981 Honda attempted to introduce a new suspension on this model, but due to their unfamiliarity with the new technology, there were numerous problems. The suspension did not work correctly and the bike had reliability issues. In

neg: Yamaha YBR125 Yamaha YBR125 The Yamaha YBR 125 is a light motorcycle made by Yamaha that succeeds it's previous model for this segment, the Yamaha SR125. Introduced in 2005, it comes in naked, faired and 'custom' variants. It has a single-cylinder, air-cooled, four-stroke engine, displacing . Model years up to 2007 use a carburetor system, with 2008 and on models using a fuel injection system. Around 2010, Yamaha introduced the dual sport version of the Yamaha YBR 125. The new model was named Yamaha YBR 125 G, and it featured several off-road improvements. These include: engine and hand guards, higher front fender,

neg: Honda RVF750 RC45 higher port roof, which reduced flow restrictions. The exhaust valves were also larger than the RC30’s in diameter The most notable change of the RC45 when released was the use of Programmed Fuel Injection. Fuel injection had been used on bikes previously but these had either been rather antiquated analog computers or very simple digital units with a minimal number of sensors for input, which resulted in very crude fueling. The RC30 had used 38 mm constant velocity carburettors which, for road use are quite nice, maintaining a high air velocity across a wide rpm range, though were not as

neg: Yamaha Genesis engine up space from the fuel tank, rather than being sited conventionally behind the engine. The Genesis engine first appeared on the 1984 Yamaha FZ750 and was later used on a variety of motorcycles for different kinds of markets. The design was used for parallel-twins (such as the TDM and the TRX) as well as for four-cylinder models. Both fours and twins had the cylinder block slanted forwards 45 degrees. The Genesis engine was also used in the Yamaha YZF-R1, FZX700, FZ750, and the USA-only FZ700. Other applications ranged from the Supersport YZF-R6 and YZF-R1 models using electronic fuel injection with

neg: Yamaha RZ350 1986, as Yamaha decided the two-stroke would use too much of their United States Environmental Protection Agency fleet emissions quota, and limit sales of their larger displacement bikes, which were more popular sellers. The RZ350 was also the first Yamaha street bike sold in the US that used a "perimeter" frame that uses rails around the underside of the fuel tank as opposed to the standard frames of the era which ran as a spine under the center of the fuel tank. The two 1984 USA models were yellow and black (Kenny Roberts Special) and a sparkle red-white and blue

neg: Yamaha YZF-R7 R7 competitive, and when they did, "the crankshafts failed". For the sake of simplicity and cost savings, Yamaha had chosen to detune the engines for bikes imported into all countries to meet the German market's maximum horsepower regulation, partially because whatever level it was detuned to was irrelevant, given that virtually every buyer intended to modify the bike from street-legal form in order to race. When the R7 was announced in 1999, only 50 were slated to be imported to the US, ten of which were earmarked for Yamaha's factory team. The waiting list for the remaining bikes far exceeded

neg: Yamaha YP400 Majesty Yamaha YP400 Majesty Yamaha YP 400 Majesty is a scooter manufactured by the Yamaha Motor Company. It was introduced to the US market in 2004 after it was introduced in Europe & Asia in 2003. In the EU and Asia this model complements a full Majesty scooter lineup, 125 cc to 400 cc. The scooter follows a Maxi-Scooter format with a single-cylinder, counterbalanced 400 cc, fuel-injected engine with a continuously variable transmission (CVT) supported by a cast-aluminium frame. The Majesty's engine features suction-piston-type fuel injection with a step-motor controlled, automatic idle speed control and throttle position sensor, an automatic decompression

neg: Yamaha SR250 of the SR250, called the Exciter I in the US with added high, cruiser style handlebars, found a standing time of 16.36 seconds at , acceleration from of 11.5 seconds, and a top speed of . Braking distance from was , and tested fuel consumption was , giving a range of . In 2001, Yamaha released their most recent SR250 due to popular demand for reliable commuters. This model is modeled after the SR500. Despite engine capacity, the two bikes are essentially of the same overall design. Yamaha SR250 The Yamaha SR250 is a single cylinder motorcycle made by Yamaha

neg: Efficient Dynamics Efficient Dynamics EfficientDynamics is a set of technologies that are defined by BMW in its products to maximise performance, reduce CO2 emissions and reduce fuel consumption. BMW's common rail injection involves managing the fuel injection at every stage from pre injection to delivery with one common rail. This improves fuel delivery and power delivery. The stop-start feature will automatically switch off the engine when the car is idling at a complete stop. This reduces fuel consumption while idling for extended periods. The engine automatically switch on when the brake pedal is released, turning your steering wheel (which activates power steering),

neg: Diesel fuel to any of the aforementioned light fuel oils. The engines did not start as well on distillate, so typically a small auxiliary gasoline tank was used for cold starting, and the fuel valves were adjusted several minutes later, after warm-up, to switch to distillate. Engine accessories such as vaporizers and radiator shrouds were also used, both with the aim of capturing heat, because when such an engine was run on distillate, it ran better when both it and the air it inhaled were warmer rather than at ambient temperature. Dieselization with dedicated diesel engines (high-compression with mechanical fuel injection and

neg: Yamaha Grizzly 600 rear suspension with dual shocks. This is reported to have significantly improved the handling characteristics of the newer model. The Grizzly includes push button 4 wheel drive and diff lock. In 2007 Yamaha came out with the Grizzly 700 that provides fuel injection and optional EPS (electric power steering), that has been getting great reviews. Also, the 700 uses "gull wing" bent axle on the rear, allowing for a shorter frame, and reduced weight. Yamaha Grizzly 600 The Yamaha Grizzly is a large utility all-terrain vehicle manufactured by the Yamaha Motor Company. It has a 595cc four-stroke engine from the

neg: Yamaha WR450F be a groundbreaking model in motorcycle history, ushering in the four-stroke era which ended the dominance of two-stroke engines in motocross and offroad racing. While many modern performance four-stroke dirt bikes have been criticized for excessive rebuild costs and short motor lifespans, the Yamaha WR400F has an impressive record of reliability, often attributed to its steel valves and generous oil capacity. In 2001 the WR400F's engine was uprated and it became the WR426F increasing the displacement to for greater power and throttle response. A beefier YZ style clutch basket and plates than those on the WR400 improved clutch performance. Frame

neg: Gasoline direct injection time reduces the airflow to the cylinders, and therefore reduces power. Fuel contains various detergents and can keep the intakes clean. When fuel is no longer being sprayed in the intake valves, small amounts of dirt from intake air and blowback carbon from the crankcase ventilation system cakes on the intake walls, even with air filters that prevent most of the dirt from entering the cylinder. This build-up can become severe enough that a piece can break off and has been known to burn holes in catalytic converters. It can also cause sporadic ignition failures. These problems have been known

neg: Gasoline direct injection E-Tec system. The E-Tec system has recently also been adapted for use in performance two-stroke snowmobiles. Yamaha also has a high-pressure direct injection (HPDI) system for two-stroke outboards. It differs from the Ficht/E-Tec and Orbital direct injection systems because it uses a separate, belt driven, high-pressure, mechanical fuel pump to generate the pressure necessary for injection in a closed chamber. This is similar to most current 4-stroke automotive designs and fat pump systems. Husqvarna/KTM is developing a DFI system for their two-stroke Enduro motorcycles. In 2011, Ossa developed the 300i a fuel-injected enduro motorcycle, the company was sold to Gas

neg: Ideal Jawa Monarch, Deluxe, Road Kings and CL II. The main reason for the company's collapse was labor trouble and increasing levels of pollution control norms which were making the two stroke bikes that the company produced obsolete. With the advent of Yamaha and Honda in India, these bikes lost their status as Yezdi's were heavier and in some cases slower with lower fuel efficiency. Ideal Jawa had factory teams for both road races at Sholavaram and the National Motorcycle Rally Championships. Yezdi's were preferred rally bikes in the 80s and 90s. Though the Yezdi factory is closed and Yezdi bikes are

neg: Hyosung GT250 eight-valve engine configuration. Twin downdraft Mikuni carburetors were standard until 2008, when fuel injection became available. "Cycle World" tested the GT250R's acceleration at in 7.6 seconds and in 16.06 seconds at . The GT250R's recorded fuel consumption is in comparison to recorded on the Kawasaki Ninja 250R. This allows the GT250R range from its fuel tank. "Motorcyclist" and "Cycle World" recorded . Non-adjustable 51 mm inverted forks are combined with a twin-spar steel frame to provide improved handling. Stock suspension setting is firm, providing stability through corners. Although commonly found only in larger sized sport bikes, the Hyosung GT250R comes

neg: Diesel engine key to minimizing emissions, and maximizing fuel economy (efficiency), of the engine. The timing is measured in degrees of crank angle of the piston before top dead centre. For example, if the ECM/ECU initiates fuel injection when the piston is 10° before TDC, the start of injection, or timing, is said to be 10° BTDC. Optimal timing will depend on the engine design as well as its speed and load, and is usually 4° BTDC in 1,350–6,000 HP, net, "medium speed" locomotive, marine and stationary diesel engines. Advancing the start of injection (injecting before the piston reaches to its SOI-TDC)

neg: Yamaha SR400 & SR500 the downtubes of the motorcycle's frame serving as the engine's oil reservoir and cooling system, thereby eliminating the need for an external oil cooler, reducing engine pumping losses, and allowing increased ground clearance as well as reduced overall width. The bike's semi-double cradle frame uses high-strength steel. The SR400 had a kick-starter and no electric start. To aid with starting, the bike had a sight glass on the right side of the cylinder head indicating the optimal cylinder position for starting, as well as a decompressor lever on the left handlebar. The fuel injection system has a throttle position sensor

neg: KTM the two-stroke bike market. New European emission laws have increased the pressure on two-stroke bikes, as their engines are less fuel efficient and produce more pollution than four-stroke motors. However, with newer advances in technology, two-strokes have begun to burn cleaner and pass stricter green standards. Starting in 2017, all newly registered motorcycles must conform with the Euro 4 regulations for emission management. In May 2017, KTM will unveil a new two-stroke engine with direct fuel injection. By pressure-injecting an electronically controlled amount of fuel into the transfer port of the cylinder, the new TPI (transfer port injection) engines will

neg: Yamaha Raptor 250R Yamaha Raptor 250R The Yamaha Raptor 250R is an All Terrain Vehicle (ATV) or quad bike. It is primarily a sport/racing bike. It has a petrol engine and can be modified for certain racing conditions weather its MX or enduro. In addition, The Raptor 250 R is a great all-rounder. It is a monster within the Yamaha company. Its price is high but it is ideal for your first bike as it is safe and fast smooth and ferocious. The Yamaha Raptor 250R is added with gas injection (fuel Inyection) replacing the carburetor to give a powerful and effective booted.

neg: Yamaha Raptor 250R Yamaha Raptor 250R The Yamaha Raptor 250R is an All Terrain Vehicle (ATV) or quad bike. It is primarily a sport/racing bike. It has a petrol engine and can be modified for certain racing conditions weather its MX or enduro. In addition, The Raptor 250 R is a great all-rounder. It is a monster within the Yamaha company. Its price is high but it is ideal for your first bike as it is safe and fast smooth and ferocious. The Yamaha Raptor 250R is added with gas injection (fuel Inyection) replacing the carburetor to give a powerful and effective booted.

neg: Yamaha XT660Z Ténéré Yamaha XT660Z Ténéré The Yamaha XT660Z Ténéré is a dual-sport motorcycle manufactured since 2008 by Yamaha. It features a single-cylinder engine, which is also used in the XT660R, XT660X, MT-03 ( 2006–2014) and Aprilia Pegaso 650 (post 2007) models. Though not sold in the US or Canada and some 40 kilos heavier than the original air-cooled Ténéré from the early 1980s, many fans saw the 660Z as a return to form for Yamaha, following the demise of the air-cooled Teneres and the less popular 5-valve iteration which replaced them. The low-rpm electronic fuel injection glitches present in previously listed machines

neg: Yamaha TDM 900 Etsuo Matsuki and his team developed another interesting feature to increase TDM engine torque and power: A variable intake duct effectively brings out the full potential of the new injection system. The air cleaner box will automatically adjust the air intake volume in accordance with engine rpm. Below 4000rpm the duct closes down about one-third of the intake area. The result is amazing: when suddenly opening the throttle, the new 900 twin pulls stronger than ever without any hesitation. And with the help of the injection system even on high mountain roads (up to 3000 meters!) the fuel mixture is

neg: Secondary air injection assist with catalysis of unburned hydrocarbons. Pumped air injection systems use a vane pump called the air pump, AIR pump, or colloquially "smog pump" turned by the engine via a belt or electric motor. The pump's air intake is filtered by a rotating screen to exclude dirt particles large enough to damage the system. Air is delivered under light pressure to the injection point(s). A check valve prevents exhaust forcing its way back through the air injection system, which would damage the pump and other components. Carbureted engines' exhaust raw fuel content tends to spike when the driver suddenly releases

neg: HMF Engineering HMF Engineering HMF Engineering, Inc. is an American manufacturer of performance-enhancing aftermarket exhaust systems. HMF is a worldwide manufacturer and distributor of ATV, UTV and motorcycle aftermarket exhaust systems. HMF Performance manufactures aftermarket exhaust systems for Honda, Suzuki, Kawasaki, Yamaha, Can-Am, KTM, Polaris, Kymco and Arctic Cat ATVs (all-terrain vehicles) and dirt bikes, as well as Honda, Suzuki, Yamaha, Kawasaki, BMW and Ducati motorcycles. HMF Engineering, Inc. was founded in 1997 by Hans Luenger in Cleveland, Ohio. Hans started the company by himself in his garage building private label aftermarket performance Ducati Motorcycle exhausts for Fast by Ferracci. As the

neg: Mountain biking aggressiveness. Dirt Jumping (DJ) is the practice of riding bikes over shaped mounds of dirt or soil and becoming airborne. The goal is that after riding over the 'take off' the rider will become airborne, and aim to land on the 'landing'. Dirt jumping can be done on almost any bicycle, but the bikes chosen are generally smaller and more maneuverable hardtails so that tricks e.g. backflips, are easier to complete. The bikes are simpler so that when a crash occurs there are fewer components to break or cause the rider injury. Bikes are typically built from sturdier materials such

neg: Honda CX series were reported to the driver through two dashboard displays: an issue with the fuel injection system would light a "Fuel System" light on the dashboard and an issue with the ignition would flash the "TURBO" indicator. Due to the bikes technological uniqueness, many bikes were sold to motorcycle maintenance trade schools for hands on classes. The CX500TC powerplant was based on the water-cooled V-twin with four pushrod-operated overhead valves per cylinder configuration used in the CX500 introduced a few years earlier. The engine case look was retained nearly intact from the original CX500. The turbocharger, at peak boost providing approximately

neg: Royal Enfield Bullet and the brand survived into the 1990s essentially as a domestic Indian commuter bike. Equivalent bikes in the market were the Yamaha RD350 and the Yezdi. Both bikes enjoy a cult following in India, but have been out of production for decades. However, this could not prevent the erosion of the bike's market once the economy was sufficiently opened up to allow the Japanese motorbikes. The bike's high fuel consumption (its main competition was from bikes with superior and more economical 100 cc engines) caused a descending spiral of sales until the company, near bankruptcy, was bought out by Eicher

neg: Touring motorcycle off-road purposes), large fuel capacity, under-stressed engines for high reliability. They may have rugged GPS navigation systems, wire-spoked wheels with road-legal knobby tyres, skid plates (to protect the engine and transmission during off-road use), and tough metal panniers. Modified adventure tourers are sometimes used in gruelling rally events, such as the Dakar Rally. Adventure tourer models include the BMW R1200GS, the KTM 990 Adventure series, and Suzuki V-Strom 1000, and many others. Although most modern adventure tourers are large capacity bikes, that has not always been so: the first winner of the Dakar Rally did so on a Yamaha XT500.

neg: Common rail actuated, the injection pressure at the start and end of injection is very near the pressure in the accumulator (rail), thus producing a square injection rate. If the accumulator, pump, and plumbing are sized properly, the injection pressure and rate will be the same for each of the multiple injection events. Common rail Common-rail direct fuel injection is a direct fuel injection system for diesel engines. On diesel engines, it features a high-pressure (over ) fuel rail feeding solenoid valves, as opposed to a low-pressure fuel pump feeding unit injectors (or pump nozzles). Third-generation common-rail diesels now feature piezoelectric injectors

neg: Multi-valve two exhaust) and electronic fuel injection (EFI) when released in October 1981 in the sixth generation Nissan Skyline. Peak output was at 6,000 rpm and at 4,800 rpm. The FJ20 was also offered with a turbocharger, producing at 6,400 rpm and at 4,800 rpm. Following Nissan's lead, the 1.6-liter (1,587 cc) Toyota 4A-GE Toyota engine was released in 1983. The cylinder head was developed by Yamaha Motor Corporation and was built at Toyota's Shimayama plant. While originally conceived of as a two-valve design, Toyota and Yamaha changed the 4A-GE to a four-valve after a year of evaluation. It produced 115-140

neg: Suzuki GT550 operator's unnecessary effort to preclude engine seizures. The 550 had the latest version of this multipoint oil injection called Crankcase Cylinder Injection (CCI). The 550 was designed to be suited as a touring motorcycle with its long wheelbase and unstressed torquey engine. The engine will pull quite easily from ~3,500 RPM. The smaller bore/longer stroke dimensions allow quick burning of the air fuel mixture, allowing the use of regular grade fuel. This type of undersquare engine configuration has long since been discarded for use in street bikes by most Japanese motorcycle engine designers due to its inherent limitations on power

neg: Yamaha T135 a road tour of ASEAN countries in November 2005 through May 2006, passing through Thailand, Malaysia, Singapore, and the Philippines. In 2008, the fuel injected version of the T135 was launched for the Thailand market (dubbed as "Spark 135i"), making it the second underbone motorcycle using fuel injection after the Honda's Wave 125i. There are 3 main Yamaha factories that assembled the T135. These are Indonesia, Thailand and newest is Philippines. In 2011, the T135 was facelifted with a new body design. The transmission of the Malaysia's and Indonesia's manual clutch variant was revised to 5-speed transmission from the previous

neg: Digifant engine management system a reliable ground signal to reference, the system was vulnerable to errors and malfunction. In the 1980s and 1990s many Volkswagen / Audi designs did not incorporate sufficient engine compartment grounding, and when the car's engine compartment became soiled with dirt, oil & road salts from several months / years of use, the fuel injection system would fail in often inexplicable ways. Backfiring, stalls & other poor running were all too common. Later versions were improved by providing multiple grounding paths, but the early Digifant systems suffered poor service reputations. Most of driveability issues can be traced back to a

neg: Yamaha Vino 125 Canada.) The Vino 125 has an air-cooled single-cylinder 4-stroke SOHC engine. The engine has a fan for supplemental cooling. It has a Mikuni BS carburetor with an auto-choke and carburetor heat device. Emissions controls are a catalyzed muffler, AIR Injection system, and an evaporative fuel canister. The braking system is a single disc front brake and a 110 mm drum rear brake. The tires are 3.50x10. The Vino has a very similar counterpart in Thailand, called Fino, which looks almost identical. Yamaha Vino 125 The Yamaha Vino 125 is a scooter introduced by Yamaha Motor Company in 2004 as a

neg: Yamaha TX750 Until the early 1970s Yamaha focused on two-stroke bikes, but concerns about pollution had begun to make two-strokes increasing unpopular. Around this same time competitors started to release new four-stroke multi-cylinder bikes with larger engines and greater levels of comfort. Yamaha added four-stroke engines to their line-up when they released the XS650 XS1 in 1970. This bike was powered by a Hosk-derived four-stroke air-cooled twin of 654 cc. Work began on a successor to the XS650 two years before its 1972 debut. Although superficially similar to the XS650, the TX750 was an almost entirely new design. The TX750 was featured

neg: Yamaha Phazer For the 2002 model year the Phazer nameplate was axed, where it would take a five year absence. Yamaha released a bold new snowmobile under the Phazer name-plate for the 2007 model year. The snowmobile featured a radical new design which is inspired from the YZ250F motocross bike. The new Phazer is powered by a new 80hp 499cc fuel-injected liquid-cooled four-stroke twin which makes its peak power at 11,000RPM. The engine is based on Yamaha's highly successful and dependable YZ250F dirt bike engine. With a 487 pound estimated dry weight, it is one of the lightest production four-strokes. Yamaha Phazer

neg: Yamaha TMAX The 2nd generation 41 mm diameter fork tubes were further enlarged to 43 mm, and front wheel size grew to 15 inch instead of 14 inch. Fuel tank capacity increased from . To mark the tenth anniversary of the TMAX roll-out, Yamaha produced a "WHITE MAX" special edition for 2010. The fourth generation TMAX had a redesigned body and powertrain. Cylinders were bored-out by 2 mm, increasing displacement to 530cc. Other engine modifications included a newly designed pent-roof combustion chamber and a reworking of the fuel injection. The continuously variable transmission and final drive system were redesigned; the previous chain

neg: Yamaha YZM500 this bike. There were also a couple of bikes used for beach races. Only eight complete YZM500s were ever made, six in 1987 and two more for the 1988 season. Yamaha used the general look of this works bike to design the 1988 YZ 250 production motocross bike, but did not use the aluminum frame on any bike before 2005 Yamaha YZM500 The Yamaha YZM500 was the best known aluminium-framed motocross works bike. It also had the distinction of being the only water-cooled, open class, two-stroke bike from Yamaha. The YZM500 only raced for two years (1987-1988) by riders Leif

neg: Hirth 3701 The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil, or optionally 100:1 oil injection. Hirth 3701 The Hirth 3701 is an in-line three-cylinder, two-stroke, carburetted aircraft engine, with optional fuel injection, designed for use on ultralight aircraft and small homebuilts. The 3701 was developed as a liquid-cooled and narrower installation alternative to the four-cylinder Hirth F-30 air-cooled engine of . The 3701 features triple Bing 34 mm slide carburetors or optionally fuel injection. The cylinder walls are electrochemically coated with Nikasil. Standard starting is electric start and recoil start is not available as an

neg: Bimota V Due Bimota V Due The V Due was a 500cc V-twin two-stroke motorcycle first manufactured by Bimota in 1997. Technical specs included the first electronically controlled direct fuel injection on a two-stroke bike, cassette type gearbox and dry clutch. Its power-to-weight ratio surpassed almost all sports bikes of the day. The first production run of 150 bikes suffered from major problems including oil leaks, seized pistons and intermittent power delivery. Many new owners simply returned their bikes at this point. In 1999 Bimota managed to fix most of the initial faults and made 26 units, all however were not road legal.

neg: Motocross sections, flat dirt, dirt obstacles, and paved road. The bikes have special road-racing tires with grooved tread to grip both the pavement and dirt. Some tracks for these race events have jumps, berms, and whoops like motocross tracks. For special events, the Supermoto track may incorporate metal ramps for jumps that can be disassembled and taken to other locations. Supermoto races may take place at modified go-kart tracks, road racing tracks, or even street racing tracks. There are also classes for kids such as the 85 cc class. Supermoto got its start in the US the late 1970s when TV

neg: Yamaha YZF-R3 bike does not have a slipper clutch. Minimal adjustable suspension is considered another downside on the bike. However, compared to other bikes in its class, it is considered finely tuned and sufficient. Yamaha R3 competes directly with Kawasaki Ninja 300. Other competitors in entry level (sub-400 cc ) bikes include Kawasaki Ninja 300, Honda CBR300R,TVS Apache RR310 and KTM RC 390. Yamaha YZF-R3 The Yamaha YZF-R3, known more commonly as the "R3," is a sport motorcycle that has been manufactured by Yamaha since 2015. A first on Yamaha twins (the other being R25), the R3 uses an offset cylinder design.

neg: Yamaha TX750 Le Mans. The Porsche-prepared engines were replaced with Yamaha engines but both bikes failed during the night with snapped cam chains. The bikes also ran at the Thruxton 500 Miles in England. Both TX750 Endurance racers are reported to have been destroyed after their racing careers were over. Yamaha TX750 The TX750 is a two-cylinder standard motorcycle built by Yamaha. The bike was released in 1972. Significant reliability problems affected the engines in early bikes. Yamaha made several changes to solve the problems but the bike was withdrawn from most markets after 1974 and production stopped in the home market

neg: 1973 FIM Motocross World Championship new motorcycle minimum weight limit of 209 pounds just before the start of the season. European motorcycle manufacturers competing in the championship complained to the FIM that Suzuki was spending millions of dollars to build lightweight motorcycles that the smaller European manufacturers found impossible to compete with. Suzuki had already developed and built their race bikes so, there was no time to build new bikes. As a result, Suzuki resorted to adding ballast to the bikes. Unfortunately, these alterations threw the bikes out of balance and caused them to lose traction. To make matters worse, Maico and Yamaha had developed

neg: Yamaha SR400 & SR500 choice was to design the new SR500 with a strong family image and a strong link to our first four stroke, the XS 650 twin, which was also inspired by British design." Yamaha has marketed the SR400 in the JDM since model year 1978, with a production hiatus for model years 2008–2009. Beginning with model year 2010, the SR400 had fuel injection and a catalyst muffler to comply with tighter emission restrictions. Yamaha began marketing the bike in Europe, Australia and the US in 2014. The SR400 has an air-cooled 4-stroke single cylinder SOHC 2-valve engine with a dry-sump, with

neg: Motorcycle in the survey for a statistically significant conclusion, though the data hinted at reliability as good as cruisers. These results may be partially explained by accessories including such equipment as fairings, luggage, and auxiliary lighting, which are frequently added to touring, adventure touring/dual sport and sport touring bikes. Trouble with fuel systems is often the result of improper winter storage, and brake problems may also be due to poor maintenance. Of the five brands with enough data to draw conclusions, Honda, Kawasaki and Yamaha were statistically tied, with 11 to 14% of those bikes in the survey experiencing major repairs.

neg: Yamaha XS Eleven new CBX1000 and Suzuki were out and out sports bikes, the shaft-drive XS1100, affectionately called the “Xcessive’, was more of a muscle bike come tourer. Heavier than and not as fast as its rivals, the XS1100 did have one particular ability – winning races." "In the lead up to the Six-Hour, the XS1100 had swept the Adelaide Three-Hour, the Perth Four-Hour and the Surfers Three-Hour. The unlikely XS1100 and Pitman Yamaha rider Greg Pretty had upstaged the biggest, baddest production bikes around, confounding everyone." In the 1979 Castrol 6 hour, XS Elevens finished second (Greg Pretty, Jim Budd) third (Len

neg: Ford EcoBoost engine was partly added due to the fuel output needs on the 3.5L HO Raptor engine, but also has several benefits for the 3.5L EcoBoost. It will prevent buildup on the intake valves and keep them clean due to fuel passing over the valves. Under certain engine conditions such as low rpm and low loads the high pressure fuel pump and direct injection system will turn off and the engine will only use the port fuel injection, reducing efficiency losses due to the HPFP. Both systems will operate at cold start, which will reduce emissions that direct injection suffers to due

neg: Fuel injection in NASCAR in addition to trucks that compete in NASCAR's Camping World Truck Series. During the 1957 NASCAR Grand National season, president of NASCAR, Bill France, Sr., immediately banned fuel injection from NASCAR. This ruling was in result to the dominance of the 1957 Chevrolet. General Motors did not offer many 1957 Chevrolet stock productions with mechanical fuel injection. However, enough were produced to allow it into NASCAR competition due to homologation rules. This ban on fuel injection would continue into the 21st century. Initially, NASCAR indicated that it would transition to fuel injection midway through the 2011 season. They ultimately decided

neg: Push start injectors. The most common method to start such a vehicle engine is to jump start it. A fuel pump is used for fuel injection. It can be mechanically driven or is electrically driven. If electrical then the same problem may arise which the battery cannot turn the pump because it is heavily discharged. A carburetor only needs suction from the internal combustion engine to work best when push starting. Once the engine is running, a fuel pump (mechanical or electrical) will continue to supply fuel to the carburettor. A modern gasoline engine contains an electronic ignition system which precisely times

neg: Yamaha Motor Company of the first to have a water-cooled motocross production bike (1977 in works bikes, 1981 in off-the-shelf bikes). Yamaha's first Motocross competition four-stroke bike, the YZ400F, won the 1998 USA outdoor national Championship with factory rider Doug Henry. Since 1962, Yamaha made production road racing Grand Prix motorcycles that any licensed road racer could purchase. In 1970, non-factory privateer teams dominated the 250 cc World Championship with Great Britain's Rodney Gould winning the title on a Yamaha TD2. Yamaha also sponsors several professional ATV riders in several areas of racing, such as cross country racing and motocross. Yamaha has had

neg: Kel Carruthers Kent Andersson. After the 1970 Grand Prix season, he accepted an offer from Yamaha to race in America. Yamaha asked him to tutor a young American dirt track racer named Kenny Roberts. In 1973, Carruthers became the manager of Yamaha's American racing team. Under Carruther's guidance, Roberts would win the 1973 and 1974 Grand National Championship for Yamaha. When it became apparent that Yamaha didn't have a bike able to compete with the dominant Harley Davidson dirt track team, they decided to send Carruthers and Roberts to Europe to compete in the road racing world championships. With Carruthers tuning the

neg: Yamaha DragStar 650 kg heavier . The Yamaha XVS650 is sold in the U.S. as the entry-level versions of the V-Star line. That line was offered from 1998 to 2008 in two different versions: the Classic and the Silverado. Both versions are built around the same 649 cc v-twin engine. The V-Star line offers the visual appeal of larger v-twin motorcycles paired with the fuel efficiency, reliability, and nimble handling of a mid-size cruiser. The V-Star 650 (and even the 1100) bikes come in three trims: All these are the base versions of the RoadStar. The RoadStar and RoyalStar generally refers to the

neg: Yamaha MT-09 fuel map, drive-by-wire throttle mapping with three selectable riding modes. The display is very similar to the XT1200Z Super Ténéré's. It also has LED headlights and taillight. Shun Miyazawa said buyers are moving away from the supersport bikes, adding, "(Yamaha) aim to create an older and younger brother and cousins (to the MT-09) - maybe the same capacity, but a slightly different concept". This was translated into the creation of the MT-07 (FZ-07 in North America), the XSR700, the XSR900 and the MT-10 (FZ-10 in North America). In "Motor Cycle News", Michael Neeves said "The MT-09 starts an exciting new

neg: Vegetable oil fuel with rapeseed oil that meets the German rapeseed oil fuel standard DIN 51605. Modifications to the engines cold start regime assist combustion on start up and during the engine warm up phase. Suitably modified indirect injection (IDI) engines have proven to be operable with 100% PPO down to temperatures of . Direct injection (DI) engines generally have to be preheated with a block heater or diesel fired heater. The exception is the VW Tdi (Turbocharged Direct Injection) engine for which a number of German companies offer single tank conversions. For long term durability it has been found necessary to increase

neg: Yamaha Genesis engine YCCT and YCCI to the less extreme but still powerful Yamaha FZ6 (4 valve per cylinder) and FZ1 Fazer line which had a simpler fuel injection designs but was essentially the same basic engine design. The most significant changes made were the 4-valve per cylinder configuration and the crossplane crankshaft found on the YZF-R1 2009, along with the change of cylinder sleeves to steel for high precision and high temperature durability. Throughout its long period of production, the Genesis range has successfully provided performance and reliability. Because of its high performance capacity (usually from 100 BHP 350 BHP), the engine

neg: Outboard motor lower pollution (especially oil in the water), noise reduction, increase fuel economy, and increased low rpm torque. Honda Marine Group, Mercury Marine, Mercury Racing, Nissan Marine, Suzuki Marine, Tohatsu Outboards, Yamaha Marine, and China Oshen-Hyfong marine have all developed new four-stroke engines. Some are carburetted, usually the smaller engines. The balance are electronically fuel-injected. Depending on the manufacturer, newer engines benefit from advanced technology such as multiple valves per cylinder, variable camshaft timing (Honda's VTEC), boosted low end torque (Honda's BLAST), 3-way cooling systems, and closed loop fuel injection. Mercury Verado four-strokes are unique in that they are supercharged. Mercury

neg: Diesel engine These systems use a combination of springs and weights to control fuel delivery relative to both load and speed. Modern electronically controlled diesel engines control fuel delivery by use of an electronic control module (ECM) or electronic control unit (ECU). The ECM/ECU receives an engine speed signal, as well as other operating parameters such as intake manifold pressure and fuel temperature, from a sensor and controls the amount of fuel and start of injection timing through actuators to maximise power and efficiency and minimise emissions. Controlling the timing of the start of injection of fuel into the cylinder is a

neg: Fuel injection 1970s. Open-loop fuel injection systems had already improved cylinder-to-cylinder fuel distribution and engine operation over a wide temperature range, but did not offer further scope to sufficiently control fuel/air mixtures, in order to further reduce exhaust emissions. Later closed-loop fuel injection systems improved the air–fuel mixture control with an exhaust gas oxygen sensor. Although not part of the injection control, a catalytic converter further reduces exhaust emissions. Fuel injection was phased in through the latter 1970s and 80s at an accelerating rate, with the German, French, and U.S. markets leading and the UK and Commonwealth markets lagging somewhat. Since the

neg: Pit bike The fairly cheap price and the mobility of these bikes made them easy to use at racing events. Popular dirt bike movies like the 1997 "Crusty Demons of Dirt 3" show how these small motorcycles can be used to do things other than just riding back and forth in the pits. A part of this movie shows people taking huge bicycle jumps on a Z50 in someone’s back yard. This movie and movies like it made people realize what these little bikes were capable of. It did not take long for the pit bike trend to catch on. By the

neg: BMW R1100GS by the R1150GS. Previous BMW motorcycles used the airhead engines such as the type 247 air-cooled flat-twin with two pushrod-activated valves per cylinder. The R1100GS engine introduced partial oil-cooling and four valves per cylinder operated by a single chain-driven camshaft. Motronic fuel injection was included instead of the carburettors found on earlier bikes. Rear suspension and driveshaft used the same Paralever swingarm system as the previous bikes, but with the addition of remote pre-load adjustment on the shock absorber. Front suspension used a new A-arm system called Telelever. Options included heated handlebar grips and ABS. BMW R1100GS The BMW R1100GS

neg: Yamaha SRX unlike its cheaper predecessor, the SRX600 did not compete well on the international market. Nimble handling, light weight, and unique styling did not compete well with the heavier, faster multi-cylinder bikes available for a similar price. Still, Yamaha claims to have sold 19,000 units of the SRX. In the USA, the SRX was officially sold only in 1986; in Germany, sales continued until 1990 In Japan, the SRX was sold with a reduced displacement of 400 cc for tax reasons, or 608 cc. Also, these models featured an oil cooler. From 1988, the 2NX model was sold, which featured a

neg: Yamaha YBR125 anti-collision fender for the head light and new block pattern tires. The Yamaha YS125 was announced in February 2017. Primarily a facelift meant to comply with Euro4 standards, Yamaha needed to do a lot of changes to the YBR125 blueprint, justifying the new moniker. The Cylinder stroke was revised from 54mm to 57.9mm, power and fuel economy increased slightly as did fuel tank capacity. Seating position is higher than it's predecessor by 15mm, and the clocks are now reminiscent of a Honda CBF125, the styling appears more aggressive and more modern while maintaining that YBR125 look. Yamaha YBR125 The Yamaha

neg: Yamaha SR400 & SR500 on the throttle body; O2 sensor in the top of the exhaust header-pipe; temperature sensor; thermo unit at the upper rear of the cylinder head; and a lean angle sensor to interrupt the fuel injection pump, in case, for example, the bike is on its side. The air filter is a disposable oil-coated paper type held in place by the airbox cover. The electrical system has an automatic cut-out to stop the engine when left idling longer than 20 minutes. The exhaust system has an exhaust pipe coated with a nano-film to prevent discoloration and includes a 3-way honeycomb-type catalytic

neg: American Flat Track Ducati, Harley-Davidson, Honda, Kawasaki, Suzuki and Yamaha street bikes with displacements between 649-800cc. AFT Twins is the pinnacle of dirt track motorcycle racing globally, and has been since the professional ranks were formalized as the Grand National Championship in 1954. Beginning this year, riders in this class will race each circuit on custom-built, twin-cylinder motorcycles generating 90+ horsepower race bar-to-bar at speeds in excess of 140 mph, often drafting to the finish line and requiring a photo finish to determine the race winner. The motorcycles in this class contain the latest in motorsport technology and will be piloted by the

neg: Yamaha R5 At this time, Soichiro Honda was alive and active in his company. He did not personally like two strokes, so Honda stayed focused on four-strokes. As the decade went by, Suzuki added displacement, cylinders, and water cooling, culminating in the GT750, a touring bike. Kawasaki added cylinders and displacement, ending with the infamous H2 750 mark IV. By default, Yamaha became the bantamweight, maxing out with a twin, still air-cooled. In the early days of the Yamaha racing team, factory race bikes were not as specialized as they are now. In fact, they were hand-built versions of the production street

neg: Mountain bike size, bottom bracket style, rear axle width and diameter, rear derailleur hanger) to accommodate both Freeride and Dirt Jump components as necessary to handle the high speeds and harsh impacts associated with their use. Slopestyle bikes are also used for light downhill or trail riding by many, if not riding jumps on the same scale as professional riders, with their durability and sophisticated suspension designs allowing for extra versatility when compared to Dirt Jump bikes. Trials bikes are set up very specifically for the purpose of bicycle trials. Two varieties of trials bike exist, those with 26" wheels (referred to

neg: Ducati L-twin engine Paul Smart in fourth, reversing their finishing order in the 200 of a month before. Now the twin could not match Agostini on the MV triple. Taglioni turned to fuel injection. Direct injection was tried on the 500 grand prix bike at a test session at Modena in March 1972. It was outlawed by the FIM as a form of supercharging soon after. By 1972 the racing bikes had Lockheed twin front discs with a single Lockheed rear disc. Unique leading axle Marzocchi front forks were used. In 1972 a three-cylinder 350 cc 12 valve dohc engine with a seven

neg: Sylvain Guintoli Sylvain Guintoli Sylvain Guintoli (born 24 June 1982 in Montélimar) is a French professional motorcycle racer. In 2017, he competed in the British Superbike Championship aboard a Suzuki GSX-R1000. He spent the early years of his career in 250cc Grand-Prix World Championship on private bikes. He was a 500cc 2 stroke test rider for Yamaha and made a single MotoGP start in 2002. Best MotoGP rookie in 2007 for Yamaha, he raced for Ducati MotoGP in 2008. After a serious leg injury in 2009, he recovered and became World Superbike Champion in 2014 for Aprilia. Guintoli made his grand prix

neg: Castrol Six Hour Lynton Carle and Otto Muller (330 laps). 250cc class winners (subject to the outcome of protests) were Lee Roebuck/Jeff Parkin (Yamaha RD-250) 326 laps, followed by Vaughan Coburn/Ron Burke (Suzuki GT-250) 326 laps and Terry Brown/Paul Grayden (Yamaha RD-250) 325 laps. Kawasaki 750 rider Warren Willing was disqualified For alleged gearbox irregularities. The end came partly because of Castrol pulling out of road racing to concentrate its efforts on initially the Mr Motocross Series and then V8 Supercars, and partly because of controversy that had dogged the event since the start over eligibility of bikes or components. Also races for

neg: Yamaha TDM 900 Yamaha TDM 900 The Yamaha TDM 900 is a 2-cylinder engine sport touring motorcycle produced by Yamaha Motor Company between 2002 and 2011. Was the third and last generation fabricated for the TDM series. Product planner Hennes Fischer remembers: "It all started back in the beginning of the nineties, when we wanted to create a bike, which would be ultimate fun on bumpy small roads. Most of us loved touring trips using tiny alpine pass roads. But most bikes at that time either needed full concentration on these small roads or simply could not cope with the constantly changing surface

neg: Yamaha RZ350 era) and was a quite different bike. Some distributors and dealers sold these bikes with custom paint jobs, causing confusion about OEM paint schemes. In many countries, these bikes were known as RDs, but in North America and Australia they were called the RZs. In Australia, England, Canada, and the USA the Yamaha RD series (RD-60, RD125, RD-200, RD250, RD350, RD400) from which the later RZ/RD were descended, were first released in the 1970s as air-cooled two-strokes. In 1980 the bikes had a redesign using ideas Yamaha gained from two-stroke Grand Prix and production race experiences. They also became liquid-cooled

neg: Hot start to the engine fuel lines and fuel injector lines in the engine compartment and, because no fuel is flowing in the lines to cool them as would be under normal operating conditions, the fuel may vaporize or "boil" within these fuel lines creating a condition called vapor lock. This combination of liquid fuel and vaporized fuel within the fuel line will result in inconsistent fuel availability to the engine fuel pump and fuel injection system. If severe, the fuel pumps can "cavitate" (when the pumping chamber fills with fuel vapor rather than liquid fuel) and become ineffective. The vapor in

neg: Fuel injection governments imposed increasingly strict exhaust emission regulations. During that time period, the vast majority of gasoline-fueled automobile and light truck engines did not use fuel injection. To comply with the new regulations, automobile manufacturers often made extensive and complex modifications to the engine carburetor(s). While a simple carburetor system is cheaper to manufacture than a fuel injection system, the more complex carburetor systems installed on many engines in the 1970s were much more costly than the earlier simple carburetors. To more easily comply with emissions regulations, automobile manufacturers began installing fuel injection systems in more gasoline engines during the late

neg: Trionic T5.5 duration of the injection. Using the oxygen sensor 1 the injection duration is corrected so stoichiometric combustion is obtained. When hard acceleration occurs, the lambda correction is masked and Wide Open Throttle (WOT) enrichment occurs for maximum performance. When opening the throttle, acceleration enrichment ("accelerationsupprikning" in Swedish) occurs and when closing the throttle deceleration emaciation ("decelartionsavmagring" in Swedish) occurs. During a cold start and warm up, before lambda correction is activated, coolant temperature dependable fuel enrichment occurs. With a warm engine and normal battery voltage the duration of injection varies between 2,5 ms at idle and approx. 18 – 20

neg: Bill Van Tichelt from a Yamaha 125cc engine. The bike was supplied with Van Tech Springer forks which were noted as having an impressive degree of adjustment. And, the Kawaski VanTech made from a Kawasaki G3TR and road tested by Modern Cycle in September 1970 where it was described as "light as the proverbial feather, and handled awfully fast." While VanTech motorcycles may not have become the biggest dirt bike manufacturer in the USA, it was certainly one of the first. To this day, VanTech motorcycles remain highly collectible vintage American made bikes. Bill Van Tichelt Bill VanTichelt (William VanTichelt or Bill VanTech)

neg: Honda VTX Series Show, and the "Interstate" VT1300CT debuted at the Toronto Motorcycle Show in December of that year. The new VT1300C bikes used updated versions of the VTX1300 powertrain and brakes; but with unusual frame geometry, new suspension components and bodywork designed collaboratively by Honda R&D Americas (HRA) and Honda's Asaka R&D Center (HGA) in Japan. The carburetor that had been used on the VTX1300 engines was replaced with fuel injection (PGM-FI) for the VT1300C, and the new engines also received new cam profiles and a redesigned exhaust system. Exhaust emission controls included secondary air injection, the PGM-FI system and two catalytic

neg: Yamaha TZ 350 inspiration and engineering basis of Yamaha's contemperaneous road going two strokes. Yamaha TZ 350 The Yamaha TZ 350 is a 2 stroke 350 cc Production Racer sports motorcycle. Production of the bike started in 1973 with Model A (60 bhp @9,500rpm) and ended 1981 with Model H (72 bhp @ 11,000rpm) when the GP series came to an end. Production Racer were series manufactured racing bikes. Two Yamaha TZ 350 models are part of the motorcycle collection of the Technikmuseum Speyer. Yamaha often leveraged the marketing of their RD and RZ series road motorcycles br referencing the TZ series. See

neg: Yamaha TZ 350 Yamaha TZ 350 The Yamaha TZ 350 is a 2 stroke 350 cc Production Racer sports motorcycle. Production of the bike started in 1973 with Model A (60 bhp @9,500rpm) and ended 1981 with Model H (72 bhp @ 11,000rpm) when the GP series came to an end. Production Racer were series manufactured racing bikes. Two Yamaha TZ 350 models are part of the motorcycle collection of the Technikmuseum Speyer. Yamaha often leveraged the marketing of their RD and RZ series road motorcycles br referencing the TZ series. See also: RD250, RD350, RD400, RZ250, RZ350. The TZ motors provided the