1980–1986 Suzuki GS/GSX 400–1100 Service Data Manual (P/N SD-0001 E-01)

Suzuki’s GS & GSX Service Data covers the GS/GSX 400–1100 models listed above, including model-specific and international-market specifications. This factory reference supplies data for inspection, adjustment, and repair assessment rather than step-by-step disassembly and overhaul instructions.

• Engine inspection: Standard dimensions and service limits for valves, guides, camshafts, pistons, rings, cylinders, crankshafts, and applicable counterbalancer components.

• Clutch and transmission: Clutch plate wear and distortion limits, spring dimensions, gear backlash, shift-fork clearances, reduction ratios, and chain specifications.

• Carburetor specifications: MIKUNI carburetor types and identification numbers, fuel levels, float heights, jetting, needle combinations, and market-specific settings.

• Electrical reference: Ignition timing, coil resistance, generator no-load voltage, regulated voltage, starter wear limits, battery specifications, and lighting wattage.

• Brakes and suspension: Disc and drum limits, hydraulic component dimensions, wheel and axle runout, fork specifications, and tire-pressure charts.

• Shaft-drive models: Secondary and final bevel-gear backlash, preload specifications, and separate gear-oil requirements for the GS850G and GS850GL.

This reference is suited to readers who already know how to inspect motorcycle components and interpret workshop measurements, because its tables provide specifications without teaching the underlying repair procedures.

Engine Inspection and Wear Assessment

The engine tables distinguish standard dimensions from service limits. Valve-guide clearances, piston-ring gaps, camshaft journal clearances, and crankshaft measurements let you compare inspected parts with the specifications for the selected model before making repair decisions.

Model-specific construction: The GSX400 and GS450 sections include counterbalancer and crankcase data, while the GSX750 section includes crankshaft thrust-clearance specifications. These differences matter when selecting the correct table for an engine inspection.

Clutch, Transmission, and Shaft Drive

Clutch data separates drive-plate thickness and claw wear from driven-plate thickness and distortion. Transmission tables add individual gear backlash, shift-fork dimensions, and model-specific reduction ratios.

For the GS850G and GS850GL, the shaft-drive tables distinguish secondary bevel-gear backlash from final bevel-gear backlash and list drive-side and driven-side specifications separately. That distinction helps prevent a measured clearance from being judged against the wrong gear pair.

Carburetion and Electrical Specifications

Carburetor identification: MIKUNI BS32SS and BS34SS tables include identification numbers alongside jet and needle specifications. Matching the carburetor identification and market column is important before comparing settings; a shared carburetor family name does not mean every calibration is identical.

Ignition and charging: The electrical tables separate signal-coil and ignition-coil resistance from generator output and regulated voltage. Specified engine speeds accompany the relevant voltage and ignition-timing entries, giving an experienced technician reference conditions for interpreting measurements.

These are electrical specification tables, not wiring diagrams or a complete fault-isolation guide.

Brakes, Suspension, and Market Differences

Brake tables distinguish disc thickness, disc runout, master-cylinder dimensions, and caliper dimensions. Suspension data includes fork spring limits, oil levels, and air-pressure specifications where applicable.

The E-code legend identifies country or area specifications. Differences also appear within model families, including GS550 brake configurations and GS1000 fork specifications. Use the exact model and market entry rather than treating the family heading as a universal specification.

Always follow standard workshop safety protocols and exercise professional judgment when applying these specifications to a live engine.

Examples from the Specification Tables

For the GS850G, standard secondary bevel-gear backlash is 0.08–0.13 mm, with a service limit of 0.25 mm. The shaft-drive table presents these alongside separate final-drive backlash and preload entries.

For the GSX1100, clutch drive-plate thickness is 2.9–3.1 mm as standard, with a service limit of 2.6 mm. These entries illustrate how the reference separates normal component dimensions from replacement limits.

PDF Reference and Page Count

Text search and navigation: PDF text search is not available, and there are no embedded PDF bookmarks. The printed contents page identifies the model sections.

One printable PDF contains 145 pages, including four introductory pages and three repeated table pages already included in that total. The introductory pages comprise the cover, foreword, country-code legend, and contents.