2024 Honda CRF450X, WIDE-RATIO SIX-SPEED TRANSMISSION: Having six speeds in the CRF450X s transmission compared to an MX bike s typical five gives you more choice, and makes this versatile bike even more versatile. You have a gear for everything from east-coast rock crawling to wide-open Baja blasts. ELECTRIC START: An electric start system ensures trouble-free starting in all conditions. The electric starter also drives the clutch side of the crankshaft, which provides superior lubrication to starter gears while allowing a narrow engine with a short, strong crank. 450cc UNICAM® ENGINE: Our Honda 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. TWIN-SPAR CHASSIS: The CRF450X uses a twin-spar aluminum chassis that takes advantage of all the lessons we ve learned on the MX track and from winning countless Bajas. The frame is both light and stiff, and provides the basis for the CRF450X s excellent handling. The chassis is also wider than the standard MX frame to accommodate the six-speed transmission. Engine Type: 449cc liquid-cooled single-cylinder four-stroke. Bore And Stroke: 96.0mm x 62.1mm. Compression Ratio: 12.0:1. Valve Train: Unicam® SOHC, four-valves per cylinder. Induction: Programmed Fuel Injection (PGM-FI), 46mm downdraft throttle body. Transmission: Wide-ratio six-speed. Final Drive: #520 Chain; 13T/51T. Front Suspension: 49mm leading-axle inverted telescopic Showa coil-spring fork with rebound- and compression-damping adjustability; 12.0-inch travel. Rear Suspension: Pro-Link® Showa single shock with spring-preload, rebound- and compression-damping adjustability; 11.8-inch travel. Front Brake: Single 260mm disc with twin-piston caliper. Rear Brake: Single 240mm disc. Front Tire: Dunlop MX52 80/100-21. Rear Tire: Dunlop MX52 110/100-18. Rake: 27.6°. Trail: 5.6 inches. Wheelbase: 58.7 inches. Seat Height: 37.9 inches. Ground Clearance: 13.1 inches. Fuel Capacity: 2.0 gallons. Curb Weight: 275 pounds (Includes all standard equipment, required fluids and full tank of fuel ready to ride). Available Colors: Red. Model ID: CRF450X.