2012 YAMAHA YZ250F YZ250FBL YZ250FBW, New For 2012 With More Power and Better Handling. The new 2012 YZ250F features a new Bilateral Beam frame, beefy new front suspension components, revised rear shock internals, and more rigidity in the swing arm axle block area. Engine refinements include a larger 39mm carburetor, optimized CDI, and lighter piston with a lighter piston pin for more power as well as exceptional throttle response in the mid-to-high speed range. Key Features New optimized engine pumps out more power in the 8,000 to 12,000 rpm range with outstanding throttle response, thanks to new crankshaft webs, new vibration-reducing counterbalancer, new connecting rod, and low-friction piston rings, as well as a new piston, piston pin, and clip assembly that s over 8% lighter overall than before. To take full advantage of these advancements, there s also new CDI mapping and a bigger 39mm carb with freer breathing air cleaner cage. Added to the new frame and suspension refinements, this latest engine gives YZ250F amazing balance a powerful, light-handling machine with performance that s accessible to all levels of riders. The new-for-2012 Bilateral Beam frame has revised rigidity balance for superior cornering performance as well as great stability on rough, high-speed straights. Beefy new front suspension components plus revised rear shock internals and more rigidity in the swingarm axle block area give this new machine a serious handling advantage with light, quick steering. The styling emphasizes the bike s lightweight and nimble handling character. The sharp, horizontal lines set the bike apart with a clean, aggressive look. New KYB suspension is tuned to work with the also new Bilateral Beam frame for unmatched handling. 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 ?rst to win an AMA National race.