$4,299
Rock Hill, South Carolina
Category
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Engine
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Posted Over 1 Month
2011 Yamaha YZ250F, 2011 Yamaha® YZ®250F Key Features May Include The Bilateral Beam frame is specific to the 250 and is more compact than the previous generation chassis. This places the rider closer to the front wheel, which delivers superb rigidity balance for unmatched lightweight handling and cornering. This nimbleness lets the rider get on the gas sooner out of corners and cross the finish line with less fatigue even on long motos. The optimized engine delivers a high level of power in the low-to- midrange, with a great torquey feel, exactly where riders want it. That is due to the straight intake boot that enhances breathing, carburetor that provides excellent throttle response and fuel atomization, and valve train components that reduce inertial mass and boost low end torque. Exhaust is also enhanced with a D-shaped exhaust port. On going refinement to the suspension and engine produces an amazingly balanced, light-handling machine with performance that's accessible to all levels of riders. The styling emphasizes the bike's light weight and nimble handling character. The sharp, horizontal lines set the bike apart with a clean, aggressive look. KYB® suspension is tuned to work with the Bilateral Beam frame for unmatched handling. The clutch lever has a light pull feel, even though the clutch has stronger engagement. The clutch also has a wide engagement range that will give riders an advantage off the line... shift after shift, moto after moto. There's no disputing the YZ250F's unmatched four-stroke prowess it was the 1st four-stroke 250 motocross bike on the market, the 1st to win an international race, the 1st to win an AMA® Supercross,® and the 1st to take an AMA® U.S. Supercross Championship® title, as well as the first to win an AMA® National race. Features & Benefits Engine The valve spring retainers are lightweight aluminum insteadof steel, and valve spring pressure is lighter for reducedvalve-opening force. This contributes to superior low-to-mid range torque characteristics due to less power-robbing friction. There's also a higher lift cam profile, while valve stem endsare chromium-nitride coated for exceptional reliability and reduced maintenance. The exhaust port is "D" shaped instead of round. This increases velocity through the port for excellent throttle response, while enhancing the power feeling of the engine. The radiator is lower and further back and the oil tank is compactand repositioned to achieve greater mass centralization. The carburetor bore has a venturi shape, plus there's recalibrated jetting and an accelerator pump. This translates to impressive response when the rider snaps open the throttle, and contributes to superb torquey low-to-mid range power characteristics. The intake boot offers a straight, smooth tract for excellent engine breathing and more power. Th
