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Yamaha XJ 900 back 1989

Engine and transmission
Engine type: 4 cylinders, 4-stroke, Inline
Displacement: 891 cc (54.44 cubic inches)
Bore × stroke: 2.7 inch × 2.38 inch (oversquare - shortstroke)
Cooling system: Air cooled
Power: 97.21 HP (71.5 kW) @ 9000 rpm
Throttle: Cable operated
Valves
Valve train: DOHC, variable
Valves per cylinder: 2
Fuel and ignition
Sparks per cylinder: 1
Fuel supply system: Carburetor
Compression: 9.6:1
Engine mounting: Transverse
Lubrication system: Wet sump
Gear box: Manual 5-speed
Clutch: Wet, multiple discs, cable operated
Final drive: Shaft
Spark plug pipe type: NGK, BPR8ES
Motor oil: Synthetic, 20W/40
Starter: Electric
Dimensions
Weight
Curb weight: 533.5 lbs
Chassis and suspension
Frame type: steel, Double cradle frame
Front
Suspension: Cartridge
Brake: Twin Disk
Tire: 100 / 90 R18
Tire pressure: 0.16 PSI, with pillion: 0.17 PSI withpilion
Rear
Suspension: twin shock, Swingarm
Brake: Disk
Tire: 120 / 90 R18
Tire pressure: 0.17 PSI, with pillion: 0.2 PSI withpilion
Other
ABS available: No
Power-to-weight ratio: 0.30 KW/lbs (3.38 lbs/HP)
Top speed: 134.84 mph
Fuel capacity: 5.81 gals
Number of riders: 2 persons

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