1974-1980 Yamaha XS650 Service Manual

Yamaha XS650 1974–1980 Service Documentation

• Covers 1974–1980 Yamaha XS650E, XS650G, and XS650SG motorcycles, including engine, chassis, and electrical system specifications
• Original OEM publication P/N LIT-1 1616-00-76, documenting servicing procedures for parallel-twin engine variants
• Contains 82 detailed diagrams, exploded-view illustrations, and comprehensive torque-specification tables
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• Laid out for standard letter and A4 printing
• Full-text search finds any part number in seconds
• This official 213-page technical publication is the reference required for engine-serial number 2F0-006501 and later builds

Component and System Documentation

This 1974–1980 Yamaha XS650E service manual provides technical data and maintenance procedures for the SOHC parallel-twin platform. The scope includes engine removal, top-end overhaul, and bottom-end assembly, along with detailed carburetion specifications for MIKUNI systems. Chassis chapters outline front and rear suspension settings, braking system diagnostics, and steering-head maintenance. Electrical sections detail charging-system checks, including A.C. generator tests and voltage-regulator adjustments.

Engine and Chassis Specifications

Engine overhaul data documents standard valve clearances at 0.10 mm for intake and 0.15 mm for exhaust. Valve-seat width is specified at 1.3 mm, with a wear limit of 2.0 mm. Primary drive gear torque is documented at 90 Nm (65 ft-lb) for engine assembly. Clutch lock nut torque is listed at 65 Nm (47 ft-lb) in the assembly section.

Coolant system capacity is not applicable to these air-cooled units. Valve clearance for the intake is listed at 0.11–0.20 mm in the cylinder head specification table. The generator brushes for the 1974–1980 Yamaha XS650E have a standard length of 14.5 mm. You can find how factory workshop documentation is structured to assist in your project. Reference only — always consult a certified technician before performing service on this equipment. An official 213-page Yamaha OEM workshop manual covering the 1974–1980 Yamaha XS650, documenting engine, chassis, electrical, and fuel-injection specifications for the XS650E, XS650G, and XS650SG models.