Yamaha XS850: review, history, specs

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

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.

Yamaha-xs850-1976-1980-0.jpg
Yamaha XS850
Manufacturer
Also called XS 850
Production 1980 - 1982
Class Standard
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
Air Filter K&N YA-1300 `80-81[1]
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
Recommended Oil Yamalube 10w-40
Fuel Capacity 6.34 Gallon (24.00 Liters)
Related Yamaha XS750
Manuals Service Manual

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

 



References

  1. 2019 K&L Supply Co Catalog. K&L Supply Co. 2019.