1978-1983 Suzuki GS850G Service Manual (P/N 99500-38002-03E, edition 1983)

• Official 100-page Suzuki OEM publication (P/N 99500-38002-03E, printed June 1983)
• Covers the 1978–1983 Suzuki GS850G motorcycle, including the GS850GT, GS850GLT, GS850GX/GLX, GS850GZ/GLZ, and GS850GD/GLD variants
• Contains 47 exploded-view diagrams, 12 electrical schematics, and 3 comprehensive torque tables for engine and chassis systems
• Details factory-authorized specifications used for all GS850G iterations throughout their production lifecycle

Manual Contents

This factory-issued service manual provides a systematic breakdown of the motorcycle's mechanical architecture. Professional technicians and mechanics will find dedicated sections covering engine teardown, top-end inspection, and lower-end maintenance. It heavily details the maintenance-free shaft drive system, fuel delivery components, carburetor setups, and transmission alignment procedures. Additional chapters outline standard break-in parameters, periodic service intervals, emission controls, and electrical system diagnostics. The layout logically groups technical operations, allowing mechanics to quickly cross-reference secondary and final bevel gear assemblies during shop work.

Specification Highlights

The technical data section outlines precise factory tolerances for the 843 cc air-cooled DOHC engine. You will find standard settings like the 8.8:1 compression ratio alongside detailed valve clearance parameters. The manual lists standard intake and exhaust clearances at 0.03–0.08 mm (0.001–0.003 in), with specific cylinder head tables noting intake variations up to 0.11–0.20 mm. Assembly data covers multi-stage cylinder head bolt torque sequences featuring final-stage angles of 130°–140°, and specifies secondary bevel gear backlash at 0.08–0.13 mm (0.003–0.005 in).

Fluid capacities and system requirements are strictly defined, noting a 3.6 L engine oil capacity for filter changes and DOT 3 or DOT 4 classification for the brake system. Ignition timing is set at 17° B.T.D.C. below 1,500 r/min and advances to 37° B.T.D.C. above 2,500 r/min. Complete torque tables for engine mounting bolts, crankshaft components, and chassis fasteners ensure precise assembly. Working on heavy motorcycle components involves inherent risks to personal safety and vehicle integrity. Always verify and adhere to the outlined factory specifications and safety protocols prior to servicing engine or chassis parts.