2015 Honda CRF 450X, 2015 Honda® CRF® 450X King Of Its Class. Taking its inspiration from Honda® s revolutionary CRF® 450R Motocross machine, the CRF® 450X gets Honda® s magical touches that transform it into the king of the trail. Touches like the Honda® Progressive Steering Damper, which helps reduce rider fatigue and improve cornering. An electric starter for easy start-ups in even the worst conditions. A Pro-Link suspension, bulletproof Unicam® engine and the kind of durability Honda® is known for. Dominate in the Dirt. Along with its powerful and lightweight engine, the CRF® 450X has dozens of smart features like works-type front and rear brake discs, a narrow fuel tank that's easy to move around, and an 18-inch rear wheel for superior tire selection and traction. In short, all the attention to detail you'd expect in a Honda®. Titanium Intake Valves Lightweight titanium intake valves permit use of smaller valve springs, reducing overall engine height. 449cc Unicam® Engine Honda® s Unicam cylinder heads combine the best of single and double-overhead-cam designs. The configuration contributes to a compact engine that saves weight over a comparable dual-overhead-camshaft motor and also permits a narrow included valve angle. This flattens the combustion chamber to facilitate ignition flame propagation, allowing a high compression ratio. Since less space is taken up in the cylinder head, the camshaft sits lower in the head for a more compact engine and a lower center of gravity. Gear-Driven Counterbalancer Gear-Driven Counterbalancer reduces vibration and drives the water pump. Eight clutch plates provide the surface area necessary to handle the engine's massive torque, while carefully matched clutch springs provide a light feel at the lever. Dual Radiators Dual radiators feature a refined core area for improved heat dissipation compared with conventional dual-radiator designs. Coolant recovery tank is located in front of the engine between the frame downtubes for improved center of gravity. Coolant tank is protected by a plastic skidplate. Twin-Sump Lubrication Twin-sump lubrication system separates the oil supply for the crankshaft, piston and valve train from the clutch and transmission. This ensures a cool supply of oil to the clutch, eliminates clutch and transmission material contamination of the engine oil, reduces the amount of circulating oil and permits the use of a smaller oil pump. Electric Starter Electric start system ensures trouble-free starting in all conditions. Electric starter also drives the clutch side of the crankshaft to provide superior lubrication to starter gears while producing a narrow engine with a short, strong crank. Works-Style Rear Brakes HRC® works-type rear brake system uses a 240mm brake rotor to its integrated rear master-cylinder and fluid reservoir
