Yamaha XJ650 (1981)

Make Model: Yamaha XJ 650 Seca


Year: 1981
Engine: Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder,
Capacity: 653 cc / 39.8 cu-in
Bore x Stroke: 63 52.4 mm
Cooling System: Air-cooled
Compression Ratio: 9.2:1
Induction: 4x 32mm Hitachi carburetors
Ignition: Transistorized
Starting: Electric
Max Power: 71 hp / 51.8 kW @ 9400 rpm
Max Torque: 57 Nm / 42 lb-ft @ 7500 rpm
Clutch: Wet Multiplate; 7 Steel 8 Friction
Transmission: 5 Speed
Final Drive: Shaft
Gear Ratio: 1st 2.187 (35/16) 2nd 1.500 (30/20) 3rd 1.153 (30/26) 4th 0.933 (28/30) 5th 0.812 (26/32)
Frame: Tubular steel dual cradle frame
Front Suspension: 36mm Kayaba forks
Front Wheel Travel: 142 mm / 5.5 in
Rear Suspension: Duel Kayaba shocks
Rear Wheel Travel: 93 mm / 3.6 in
Front Brakes: 2x 268mm disc 1 piston calipers

Rear Brakes: Drum
Front Tyre: 3.25-19
Rear Tyre: 120/90-18
Wheelbase: 1445 mm / 56.8 in
Seat Height: 780 mm / 30.7 in
Ground Clearance: 145 mm / 5.7 in
Dry Weight: 206 kg / 465 lbs
Fuel Capacity: 19.5 Litres / 5.1 US gal
Consumption Average: 48.6 mpg
Standing 1/4 Mile: 12.6 sec. / 171 km/h


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