Yamaha XJ650 Special (1980)

The Yamaha XJ650 Special is a 1980 motorcycle with a four-stroke, transverse four-cylinder, DOHC, and two valves per cylinder. It has a capacity of 653cc or 39.8 cubic inches, with a bore x stroke of 63 52.4 mm. The bike is air-cooled, has a compression ratio of 9.2:1, and uses 4x 32mm Hitachi carburetors for induction. With a transistorized ignition and electric starter, it produces a maximum power of 71 hp / 51.8 kW @ 9400 rpm and a maximum torque of 57 Nm / 42 lb-ft @ 7500 rpm. The clutch is a wet multiplate with 7 steel and 8 friction plates, while the transmission is a 5-speed with shaft final drive. The bike has a tubular steel dual cradle frame, telescopic coil spring front suspension, and dual shocks swinging arm rear suspension. It uses a single 298mm disc 1 piston caliper front brake and a drum rear brake. The front tire is 3.25 H19, and the rear tire is 130/90 H16. With a wet weight of 243 kg / 535 lbs and a fuel capacity of 13 liters / 3.4 US gal, it averages 46.3 mpg and has a standing quarter-mile time of 13.0 sec / 102 km/h, with a top speed of 123 km/h.

Technical specifications:

Make Model: Yamaha XJ 650 Special

Year: 1980
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: Telescopic coil spring forks
Rear Suspension: Dual chocks swinging arm
Front Brakes: Single 298mm disc 1 piston caliper
Rear Brakes: Drum
Front Tyre: 3.25 H19
Rear Tyre: 130/90 H16
Wet Weight: 243 kg / 535 lbs
Fuel Capacity: 13 Litres / 3.4 US gal
Consumption Average: 46.3 mpg
Standing 1/4 Mile: 13.0 sec / 102 km/h
Top Speed: 123 km/h