Suzuki GSX1100, GS1150 manual, 1980–1987 models (P/N 99500-39032-01E)

This 306-page PDF scan contains the Suzuki Motor Corporation GSX1100/GS1150 service manual, identified in the publication as Manual No. 99500-39032-01E. The colophon shows a fourth edition dated October 1995 and a first edition dated January 1984. Suzuki states that the manual was produced primarily for experienced mechanics while also addressing apprentice and do-it-yourself mechanics; its overhaul coverage assumes practical shop knowledge and access to precision measuring equipment.

• Documents engine removal and reinstallation, complete disassembly and reassembly, cylinder-head repair, valve and camshaft inspection, cam-chain service, piston and crankshaft work, clutch service, and internal transmission repair.

• Explains the Mikuni BS36SS carburetor system, including vacuum fuel-cock operation, carburetor separation and assembly, float and needle-valve inspection, fuel-level adjustment, carburetor synchronization, lubrication flow, and oil-pressure testing.

• Traces faults through the transistorized ignition, charging system, starter motor and relay, combination meter, fuel and oil-temperature gauges, monitor unit, switches, and self-canceling turn-signal system.

• Details front and rear brake repair, caliper and master-cylinder service, hydraulic bleeding, wheel-bearing replacement, tubeless tire work, Posi-Damp fork service, steering-stem adjustment, swingarm bearings, and Full-Floating rear-suspension service.

• Provides market-specific wiring diagrams, wire/cable/hose routing views, component torque tables, maintenance and lubrication charts, special-tool identification, fluid specifications, electrical test data, adjustment data, and inspection and wear limits.

Model and Supplement Coverage

The cover names the GSX1100E, GSX1100ES, and GSX1100EF, with GS1150E and GS1150EF identified as the Canadian designations. Section 8 contains only the procedures, specifications, and new features that differ for the GSX1100ES/EF and GS1150EF, including cowling service, revised cable routing, and separate suspension settings.

The section marked ’85-MODEL supplies service data for GSX1100EF/ESF/EFF and GS1150EF/ESF/EFF. The ’86-MODEL section covers GSX1100EG/ESG/EFG, GSX1150EFG, and GS1150EG/EFG. These later sections supplement the main repair chapters rather than repeating every overhaul procedure.

Engine and Driveline Repair Depth

The 1135cc air-cooled DOHC TSCC four-cylinder engine receives full overhaul coverage. Cylinder-head work extends to valve-guide removal, reaming and installation, valve-seat cutting and contact inspection, valve-spring testing, and camshaft journal measurement. The manual also covers cylinder-bore evaluation, oversize piston selection, piston-ring groove and end-gap inspection, connecting-rod checks, crankshaft runout, and automatic cam-chain tensioner service.

Reassembly material addresses crankcase bearing pins and C-rings, shift-fork positioning, primary driven-gear shim selection, clutch-stack arrangement, piston and ring orientation, cam timing, and tensioner function checks. The five-speed transmission section covers gear wear, shift-fork clearance, bearing and circlip orientation, and countershaft service.

Fuel, Electrical, and Diagnostic Material

The carburetor chapter illustrates the diaphragm, slow, main, starter, and float circuits before covering internal service and final synchronization. Market-code tables distinguish carburetor and electrical specifications rather than treating every regional version as identical.

Diagnostic illustrations include market-specific full wiring diagrams, the transistorized ignition circuit, regulator/rectifier charging schematics, the engine lubrication-flow diagram, the monitor-system circuit, and the self-canceling turn-signal diagnostic chart. Component tests cover ignition coils, signal generator, ignitor, alternator stator, regulator/rectifier, starter motor, starter relay, gauges, sensors, and switch continuity.

Tooling, Scope Limits, and Shop Cautions

Suzuki tool numbers are supplied throughout the procedures. Representative examples include carburetor balancer 09913-13121, valve-seat cutter set 09916-21110, rotor remover 09930-34930, and front-fork oil-level gauge 09943-74111.

The manual warns that matched camshaft holders must be returned to their proper locations and drawn down evenly; incorrect tightening can damage the cylinder-head and journal-holder thrust surfaces. It also notes that driving a replacement valve guide into an unoiled bore can damage both the guide and the head.

The oil pump, Posi-Damp unit, and rear shock absorber are treated as replacement assemblies rather than internally rebuildable components. Use secure lifting support during engine removal, keep ignition sources away from gasoline and battery work, and follow the factory precautions for brake-fluid handling and tire inflation.