1990–1995 Suzuki GSX-R750 Factory Service Manual

• Catalog coverage: Identifies the Suzuki GSX-R750M E28 (1991) from frame JS1GR7AA M2100001~, plus GSX-R750WN, GSX-R750WP, GSX-R750WR, and GSX-R750WS E28 (1992-1995) from frames JS1GR7BA N2100001~, P2100001~, R2100001~, and S2100001~.
• PDF scope: Combines 223 pages - an 83-page GSX-R750M catalog and a 140-page WN/WP/WR/WS catalog - with 180 illustrated parts sheets organized as 56 and 66 numbered figure groups.
• Engine and drivetrain breakdowns: Covers the cylinder head and valve train, cylinder, crankcase, crankshaft, oil pan and pump, starter clutch, clutch, transmission, and gear-shift assemblies.
• Fuel, cooling, and exhaust coverage: Details carburetors and fittings, air cleaner, fuel tank and cock, muffler, and oil cooler; the WN-WS catalog adds oil-filter, water-pump, radiator, and radiator-hose figures.
• Chassis and electrical identification: Maps frame and body panels, front and rear suspension, steering, wheels, brake hydraulics, starting and charging components, instruments, lamps, switches, and wiring-harness assemblies.
• Variant control: Separates many N/P and R/S applications, with additional model-specific figures for fuel tanks, frame covers, cowling bodies, installation hardware, and color combinations.
• Parts-reference tools: Lists reference number, Suzuki part number, description, quantity, and remarks for each callout, supported by color charts, section indexes, and part-number-to-figure indexes.

Document Structure and System Layout

When a GSX-R750 is on the lift and a component has to be identified before ordering, the figure-address system is the core of this catalog set. Each illustrated sheet pairs an exploded view with the matching parts list. Section indexes point directly to assemblies such as the Cylinder Head, Crankshaft, Carburetor, Wiring Harness, Front Calipers, and Cowling Body. The final numerical indexes work in reverse, letting you start with a known part number and trace it back to the related figure address.

The difference between the two catalogs matters. The GSX-R750M publication includes an oil-cooler breakdown but no water-pump or radiator sections. The WN/WP/WR/WS catalog adds those liquid-cooling assemblies and a much larger set of year-code splits. Separate or revised figures appear for the cylinder head, starting motor, speedometer, headlamp, wiring harness, frame, fuel tank, seat, front damper, brake assemblies, rear suspension, and bodywork. Those distinctions help keep a repair or restoration parts order tied to the correct production variant instead of treating the 1991-1995 machines as one interchangeable design.

Component Specification Previews

Some listings go well beyond a generic component callout. On the GSX-R750M Cylinder Head sheet, spark-plug applications are itemized for NGK CR10EK and ND U31ETR, with NGK CR9EK and ND U27ETR shown as optional choices. The later catalog carries separate N/P and R/S plug listings. Carburetor figures identify the individual left, middle-left, middle-right, and right carburetors, along with diaphragms, jet needles, pilot jets, main jets, air jets, floats, starter components, and throttle parts. Position- and model-dependent jetting is shown in the remarks rather than collapsed into one universal setup.

Crankshaft pages categorize crank-pin, main, and thrust bearings by Green, Black, Brown, Yellow, Red, Blue, and White selections. That detail matters during bottom-end repair because the bearings are not interchangeable generic items. Ordering by illustration position alone, without checking the listed color and model remarks, can create the wrong running clearance and damage the crankshaft or crankcase. A similar trap exists between WN/WP and WR/WS assemblies: parts that look alike on the bench may use different mounting points, connectors, brake hardware, or bodywork fitments.

Scope and Correct Use

These PDFs are factory parts catalogs, not service or repair manuals. Suzuki's own preface states that the drawings are for spare-part-number reference and are not to be used as an assembly manual; assembly work requires the applicable Suzuki Service Manual. The set does not provide step-by-step removal, disassembly, timing, torque, troubleshooting, or circuit wiring diagrams. Use it to identify and order parts before or during a repair, then follow the correct service documentation for the work itself.

Brake, steering, suspension, fuel-system, and internal-engine work can create serious safety or component-damage risks when the motorcycle is unsupported or procedures are improvised. Major repair work should be carried out with the correct service information, proper support equipment, and suitable training.