2005 Yamaha WR450F, DR.D EXHAUST, PRO ACTION SUSPENSION, WORKS CONNECTION RADIATOR GAURDS, SKID PLATE, TRAIL TECH ENDRANCE COMPUTER, HAND GAURDS - Its Got the Power to Unravel Any Trail The WR450F was already the mightiest beast in the woods. For 2005 , it returns with more ability to stalk down a trophy than ever. Frame height is reduced by 10mm Seat height is a full 20mm lower Slimmer shrouds, seat, and fuel tank New, fully adjustable 48mm front fork tubes ...all increase rider mobility, maneuverability, and handling. Convenient electric start. The amazing five-titanium-valved four-stroke , good for 11,000 rpm, working through a wide-ratio five-speed gearbox can still climb any mountain at the touch of its electric-start button. But add these new features - New carburetor and ignition settings New air injection system (AIS) on California models (green sticker ready) New Renthal aluminum handlebar New clutch lever shape New aluminum muffler New rear sprocket ... and you have the most power-packed, sharpest, nimble big-bore WR ever.