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Yamaha YZ 490 1987 forward

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Engine and transmission
Engine type: 1 cylinders, Single
Displacement: 487 cc (29.76 cubic inches)
Bore × stroke: 3.43 inch × 3.23 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: Vertical
Lubrication system: Wet sump
Gear box: Manual
Clutch: Wet, multiple discs, cable operated
Final drive: Chain
Spark plug pipe type: NGK, B8EG
Starter: Electric
Chassis and suspension
Frame type: steel, Single cradle frame
Front
Suspension: Cartridge
Tire: 80 / 100 R21 M
Tire pressure: 0.07 PSI
Rear
Suspension: mono shock, Swingarm
Brake: Drum
Tire: 110 / 100 R18 M
Tire pressure: 0.07 PSI
Other
ABS available: No
Number of riders: 2 persons

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