1980 Yamaha XS850, XS850G, XS850SG Service Manual

Yamaha XS850, XS850G, XS850SG 1980 Service Documentation

• This 1980 Yamaha XS850 service manual covers the XS850G and XS850SG models, detailing factory specifications for maintenance and engine overhauling.
• Official Yamaha publication P/N 3U8-28197-70, issued for the 1980 model year.
• Contains 47 detailed exploded-view diagrams of the engine, transmission, and chassis components.
• Accessible from your device as soon as the order is placed.
• OCR text layer lets you jump to a torque spec by keyword.
• Suitable for printing individual sections for shop-floor use.
• Stored against your account so you can retrieve it after a hard-drive loss.
• This 1980 edition provides the baseline factory parameters for the 3U8 and 3V0 serial number series, documenting the unique air-suspension and clutch-damper configurations required for correct bike assembly.

Technical Scope and Structure

The 1980 Yamaha XS850 service manual provides a structured look into vehicle identification, periodic inspection, and engine maintenance. This what an OEM service publication covers includes chapters on general maintenance intervals, lubrication schedules, and detailed overhauling procedures for the cylinder head, pistons, clutch, and transmission assemblies. Special tools are clearly identified throughout to support accurate component removal and reassembly.

Specification Highlights

Factory values for engine performance and chassis settings are documented throughout the reference sections. Intake valve clearance is listed at 0.11–0.15 mm in the valve clearance specification table. Coolant system capacity is not applicable as this model utilizes an air-cooled engine configuration. The standard compression pressure for the Yamaha XS850 is documented at 11 bar (156 psi) at sea level. The Yamaha XS850 and XS850G/SG 1980 service manual provides the essential maintenance, overhaul, and chassis technical data required for the 3U8 and 3V0-series triple-cylinder motorcycle builds.