Segment: Enduro/Offroad
Production years: 2008, 2009
The YZ450F is the top-of-the-line competition bike, packing almost scary amounts of torque and top-end power to put a big grin on the faces of experienced riders. Often referred to as the ultimate step in motocross machines, the 2009 model year brings new camshafts, a shorty, lighter muffler and a new intake design for better performance across the whole rev range.
This model year also used a revised frame and a new 48mm fork. As for the rest, the YZ450F stands as one of the best packages in the business, with a beastly 449cc 5-valve, 4-stroke liquid-cooled mill generating all the dirt fun.
engine specs | Type: | liquid-cooled DOHC 4-stroke; 5 titanium valves | Displacement: | 449 cm3 | Bore X Stroke: | 3.7x2.5 in OR 94 mm | Compression Ratio: | 12.3:1 | Horsepower: | -/- KW(hp)/RPM | Torque: | 39/6500 lb-ft/RPM OR 53/6500 Nm/RPM | Fuel System: | Keihin FCR-MX39, flat slide w/ throttle position sensor |
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transmission specs | Gearbox: | 5-speed, manual | Clutch: | Multiplate wet clutch | Primary Drive: | - | Final Drive: | chain |
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chassis specs | Frame: | Aluminium semi-double-cradle | Front Suspension: | Adjustable Kayaba 48 mm inverted fork; 300 mm (11.8 in.) travel | Rear Suspension: | Fully adjustable Kayaba link monocross; 314 mm (12.4 in.) travel | Front Brake: | 250mm floating disc | Rear Brake: | 245mm disc |
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dimension specs | Overall Length: | 86.3 in OR 2192 mm | Overall Width: | 32.5 in OR 826 mm | Seat Height: | 38.9 in OR 988 mm | Wheelbase: | 58.8 in OR 1494 mm | Ground Clearance: | 14.7 in OR 373 mm | Weight: | 238 lbs OR 108 kg | Fuel Capacity: | 1.8 gallons OR 6.8 L |
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tyres specs | Front: | 80/100-21-Dunlop 742FA | Rear: | 120/80-19-Dunlop 756 |
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