Yamaha YZ 450 FS2003 forward

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449cc, Single

Final drive: Chain
Engine and transmission
Engine type: 1 cylinders, 4-stroke, Single
Displacement: 449 cc (27.43 cubic inches)
Bore × stroke: 3.74 inch × 2.5 inch (oversquare - shortstroke)
Throttle: Cable operated
Valves
Valves per cylinder: 4
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Ignition type: Digital CDI
Engine mounting: Transverse
Lubrication system: Wet sump
Gear box: Manual
Clutch: Wet, multiple discs, cable operated
Final drive: Chain
Spark plug pipe type: NGK, CR8E
Motor oil: 20W/40
Chassis and suspension
Front
Tire: 80 / 100 R21
Tire pressure: 0.07 PSI
Rear
Tire: 100 / 90 R19
Tire pressure: 0.07 PSI
Other
ABS available: No
Number of riders: 2 persons

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