Yamaha XS850

'Yamaha XS850'
Manufacturer	[[Yamaha]]
Also called	XS 850
Production	1980 - 1982
Class	[[:Category:Standard motorcycles|Standard]] [[Category:Standard motorcycles]]
Predecessor	Yamaha XS750
Engine	in-line three, four-stroke
Bore / Stroke	71.5mm x 68.6mm
Compression ratio	9.2:1
Top Speed	122 mph (196 km/h)
Horsepower	77.38 HP (57.7 KW) @ 8500RPM
Spark Plug	NGK BP7ES '80-81
Battery	YUASA YB14L-A2 '80-81
Transmission	Gear box: 5-speed Final Drive: shaft drive (cardan)
Final Drive	Shaft
Suspension	Front: Telescopic Forks Rear: Swing Arm
Brakes	Front: dual disc Rear: single disc
Front Tire	3.25-19
Rear Tire	4.00-18
Weight	258.0 kg (wet)
Oil Filter	K&N KN-146
Fuel Capacity	6.34 Gallon (24.00 Liters)
Related	Yamaha XS750
Manuals	Service Manual

The Yamaha XS850 was a in-line three, four-stroke Naked motorcycle produced by Yamaha between 1976 and 1982. It could reach a top speed of 122 mph (196 km/h). Claimed horsepower was 77.38 HP (57.7 KW) @ 8500 RPM.

History

Made in the US from 80-81 Also offered in Europe in 80-82 This is an evolved version of the XS750 (a shaft drive, 2 valve per cylinder, 3 cylinder, 4 stroke) which was basically bored out in 1980 to become the 850.

Offered as

• XS850G 80 Standard UJM
• XS850SG 80 Special
• XS850LG 80 Midnight Special
• XS850H 81 Standard UJM
• XS850SH 81 Special
• XS850LH 81 Midnight Special

Information and a forum following is the same as for the XS750.

Engine

The engine was a air cooled in-line three, four-stroke. A 71.5mm bore x 68.6mm stroke result in a displacement of just 826.0 cubic centimeters. Fuel was supplied via a double overhead cams/twin cam (dohc).

Drive

The bike has a 5-speed transmission.

Chassis

It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via dual disc in the front and a single disc in the rear. The front suspension was a Telescopic Forks while the rear was equipped with a Swing Arm. The XS850 was fitted with a 6.34 Gallon (24.00 Liters) fuel tank.

1980 - 1982 Yamaha XS 850