Yamaha XJ 900

Yamaha XJ 900

The 1984 Yamaha XJ 900 is a stylish and Supersport motorcycle with Air cooled, 891cc, Inline-4, DOHC and 97.21 HP (71.5 kW) @ 9000 rpm.

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Model year
1984
make icon
Make
Yamaha
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Engine Power
97.21 HP (71.5 kW) @ 9000 rpm
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Top Speed
134.84 mph

Technical Specifications

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
  • Valve train:
    DOHC, variable
  • Valves per cylinder:
    2
  • 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

  • Curb weight:
    533.5 lbs

Chassis and suspension

  • 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
  • Frame type:
    steel, Double cradle frame

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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