$8,749
2015 Yamaha YZ250FX The high flying, high paced action of motocross is not for everyone. As a result, the slightly less intense world of cross country / harescramble racing is experiencing solid growth and interest. Yamaha is pleased to announce the YZ250FX, a cross country focused model with the performance potential of the YZ250F. If you are serious about winning, the new YZ250FX could be the machine for you. Key FeaturesLatest generation YZ250F based rear slanting engine and Bilateral Beam chassisForward mounted fuel injection and wrap around exhaustElectric starting6-speed transmissionYZ based, adjustable suspension18 inch rear wheelAdjustable handlebarGYTR Power Tuner compatible/// ENGINEYZ250F based, ''reversed'' liquid-cooled, 250cc, DOUBLE OVERHEAD CAMSHAFT, 4-valve (titanium), 4-stroke, single with fuel injection and electric starting. The engine has been tuned for excellent ''rideability and controllability'' and delivers a broad, easy to use power band with excellent power characteristics in the mid to upper rpm range. Rearward slanting cylinder that is ''reversed'' compared to traditional designs. The FI throttle body and air box are front mounted and provide a straight intake path, while the exhaust exits from the rear of the cylinder. This design is pre-owned to centralize mass for excellent handling and a light feel. The other major benefit is the straight shot intake system which maximizes power output.The ''reversed'' design allows for a straight intake path into the cylinder, providing max intake flow and efficiency for excellent power. The front positioned intake means that engine heat will have less ''heating effect'' on the incoming fuel charge (cooler fuel helps increase power). The most important benefit of this design is mass centralization which improves both handling and suspension performance.Electric starting backed up by a manual kick starter too. The automatic decompression system has been optimized for fast, sure starts. The unit can be started in any gear.There is no main switch on this model. Instead you simply push the automatic start button (RHS handlebar) which then activates the entire electrical system and starts the bike. To shut down the entire electrical system, hold the kill switch (LHS handlebar) for a few seconds.Compact 4-valve cylinder head features a 13.5:1 compression ratio. The titanium intake valves are 31mm in diameter while the titanium exhaust valves are 25mm, with a 23.75 degree valve angle for a compact combustion chamber design. The 4-valve design offers optimum flow and excellent power.Lightweight titanium valves and load-reduced oval valve springs reduce reciprocating mass for less friction, faster-revving and smoother-hitting power delivery across the rev range.Automatic cam chain tensioner reduces maintenance while special cam chain ''sliders'' reduce internal frictional losses.WR spec light weight hollow intake and exhaust camshafts enhance this unique engine design and offer a broad power band.The lightwei
