Yamaha XS850 SG Special (1980)

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The Yamaha XS 850SG Special is a motorcycle that was produced in 1980. It has a four-stroke, transverse three-cylinder engine with a capacity of 826 cc and a bore x stroke of 71.5 x 68.6 mm. The compression ratio is 9.2:1 and the cooling system is air-cooled, while the lubrication system is wet sump. The bike is equipped with 3 x 34mm Hitachi HSC34 carburetors and transistor-controlled ignition. It has both electric and kick starting options. The maximum power output of the bike is 57.7 kW / 79 hp at 8500 rpm, with a maximum torque of 66.7 Nm / 6.8 kgf-m / 49.2 ft-lb at 6500 rpm. The transmission is a 5-speed system, and the final drive is shaft driven. The front suspension is air-assisted telescopic forks, with 175mm wheel travel, while the rear is a swing arm with 4-way adjustable damping, with 99mm wheel travel. The brakes consist of two 267mm discs and one-piston calipers in the front, and a single 267mm disc and one-piston caliper in the rear. The bike has a length of 2175 mm, a width of 900 mm, and a height of 1190 mm. The ground clearance is 140 mm, while the dry weight is 241 kg and wet weight is 258 kg. The fuel capacity is 24 liters or 6.3 US gallons. The bike has a standing 1/4 mile time of 13.3 seconds at 158 km/h or 98.2 mph.

Technical specifications:

Make Model: Yamaha XS 850SG Special

Year: 1980


Engine: Four stroke, transverse three cylinder, DOHC, 2 valves per cylinder
Capacity: 826 cc / 50.4 cu in
Bore x Stroke: 71.5 x 68.6 mm
Compression Ratio: 9.2:1
Cooling System: Air cooled
Lubrication System: Wet sump
Induction: 3 x 34mm Hitachi HSC34 carburetors
Ignition: Transistor controlled
Starting: Electric and kick
Max Power: 57.7 kW / 79 hp @ 8500 rpm
Max Torque: 66.7 Nm / 6.8 kgf-m / 49.2 ft-lb @6500 rpm
Transmission: 5 Speed
Final Drive: Shaft
Front Suspension: Air assisted telescopic forks, 175mm wheel travel.
Front Wheel Travel: 175 mm / 6.9″

Rear Suspension: Swing arm 4-way adjustable damping, 99 wheel travel
Rear Wheel Travel: 99 mm / 3.9″
Front Brakes: 2 x 267mm Discs, 1 piston calipers
Rear Brakes: Single 267mm disc, 1 piston caliper
Front Tyre: 3.25H-19
Rear Tyre: 4.00H-17
Dimensions: Length: 2175 mm / 85.6″Width: 900 mm / 35.4″Height: 1190 mm / 46.9″
Wheelbase: 1450 mm / 57.1″
Grounc Clearance: 140 mm / 5.5″
Dry Weight: 241 kg / 531 lbs
Wet Weight: 258 kg / 569 lbs
Fuel Capacity: 24 Litres / 6.3 US gal
Standing 1/4 Mile: 13.3 sec / 158 km/h / 98.2 mph

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