Year : 2011 Manufacturer : Can-Am Model : DS 450 X MX Engine Type : Single-cylinder, DOHC 4-valve head, 38 mm intake valve, 31 mm Nimonic - alloy Engine Displacement : 449.3cc Bore & Stroke : 97 mm x 60.8 mm Compression Ratio : NA Cooling : Liquid-Cooled Fuel System : 46 mm Throttle Body, 16 bit / 32-MHz CPU Ignition : Electronic Starting System : Electric Transmission : 5-speed manual / heavy-duty clutch, 9 friction plates with DirectLink mechanism Final Drive : 520 O-ring high capacity chain, aluminum sproket hub, aluminum sprocket, rigid axle Rake and Trail : NA Wheel Base : 50 in. Seat Height : 33 in. Front Suspension : R-Type forged aluminum Double A-arm – KYB HPG piggyback shocks 9.5 in. travel Rear Suspension : R-Type cast-aluminum swingarm Chromoly hollow rear axle KYB HPG shocks Front Brake : Dual 182 mm discs with inverted twin-piston calipers Rear Brake : 198 mm rotor with single piston caliper Front Tire : ITP QuadCross MX PRO 20 x 6R-10 in Rear Tire : ITP QuadCross MX PRO