2018 Yamaha YFZ450R, We make it easy to buy and fun to own! Ask us about Speed Pass Maintenance , call Jason @ 1-866-269-2591 for more information! 2018 Yamaha YFZ450R REIGNING 5-TIME CHAMP. The YFZ450R continues its championship streak on the track and trail with class-leading technology and pure performance. Features may include: Race-Ready Engine The YFZ450R is the most technologically advanced sport ATV on the market today. It combines a high-tech, quick-revving, titanium-valved, 449cc fuel-injected engine with a lightweight, professional-caliber cast aluminum/steel chassis. The power and chassis combination makes for a championship-winning machine time and time again. Advanced Frame The YFZ450R is motocross ready. The weldless frame is designed from lightweight aluminum, with a tension-steel bottom frame that lets the engine sit lower for excellent mass centralization. Suspension components and settings reduce weight while providing light, sharp handling and rider comfort. Aggressive Bodywork Bodywork is designed for great ergonomics and rider comfort, with more room to hang off in the corners, and the seat shape is padded in just the right places to improve lap times. Body panels come off easily without tools for service; there s no need to remove the battery or other components to take the fenders off. Advanced Cylinder Head The 449cc engine uses titanium five-valve cylinder head technology designed to deliver abundant power in the mid-range to top end, with more hit feeling right off idle. The higher compression ratio further improves overall engine performance. Fuel Injection The YFZ450R incorporates Yamaha Fuel Injection for precise fuel delivery. With a big 42mm Mikuni® throttle body and 12-hole injector, this system provides exceptional atomization of the fuel for maximum power. The system also includes ISC (Idle Speed Control) for easy, reliable start-up and warming. Assist and Slipper Clutch An assist-and-slipper clutch reduces clutch lever effort for less fatigue while at the same time increasing clutch plate pressure for positive engagement. This clutch system also reduces engine braking effect, which allows faster cornering, particularly when downshifting.