YFZ 450 Specifications Engine Type: 439cc, 4-Stroke Single, Liquid Cooled w/ Fan, Titanium 5-Valve DOHC Bore x Stroke: 95mm x 62mm Compression Ratio: 11.9:1 Carburetion: Keihin 39mm FCR w/ Throttle Position Sensor Ignition: DC - CDI Starting System: Electric Transmission: 5-Speed Manual Clutch Drive Train 2WD; Sealed O-Ring Chain Chassis Suspension/Front: Independent Double Wishbone, 9.1 w/ Compression and Threaded Preload Adjustment Suspension/Rear: Aluminum Swing Arm, 10.1 w/ Rebound, Compression and Threaded Preload Adjustment Brakes/Front: Dual Hydraulic Disc, Twin Piston Brakes/Rear: Hydraulic Disc Tires/Front: AT21 x 7-10 Radial Tires/Rear: AT20 x 10-9 Radial Dimensions L x W x H: 72.4 x 46.1 x 42.9 Seat Height: 31.5 Wheelbase: 50.4 Ground Clearance: 4.4 Fuel Capacity: 2.6 Gallons Dry Weight: 350 Lbs.