Yamaha XS850 SG Special (1980)

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.

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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