Built with pride at Yamaha’s U.S. factory in Newnan, Georgia and motocross-ready, the weldless professional-caliber frame is designed from lightweight aluminum with a tension-steel bottom frame allowing the engine to sit lower for excellent masscentralization. Suspension components and settings further reduce weight while providing light, sharp handling and rider comfort. Comfort and convenience are further enhanced with an assist-and-slipper clutch, reducing clutch lever effort for less fatigue, while also increasing clutch plate pressure and reducing engine braking for faster cornering, particularly while downshifting. Further improving lap times, the YFZ450R’s ergonomic bodywork allows the rider increased room to shift their weight in the corners and leverage the race-inspired padded seat to maximize traction and momentum. Riders can easily remove the no-tool body panels, quickly accessing key service areas without the need to remove the battery or other components.
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.
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.
With more room to hang off in the corners, the bodywork is designed for great ergonomics and rider comfort. The seat shape is padded in just the right places to improve lap times while the body panels come off easily without tools for service, so 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 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.
The YFZ450R incorporates Yamaha Fuel Injection (YFI) 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 for faster cornering, particularly when downshifting.
Engine Type: 449cc liquid-cooled DOHC 4-stroke; 5 titanium valves
Bore x Stroke: 95.0mm x 63.4mm
Fuel Delivery: Yamaha Fuel Injection (YFI), 42mm
Ignition: TCI: Transistor Controlled Ignition
Transmission: 5-speed; wet multiplate assist-and-slipper clutch
Final Drive: O-ring chain
Compression Ratio: 11.8:1
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Call Cycle Springs Powersports for all your ATV and Quad questions! 727-771-1211