Suzuki RG250 & RG250W Service Manual Set, 1983–1987 (P/N 99500-12061-01E)

Each book pairs its base workshop chapters with a model update. Use the RG250WE update alongside the RG250W chapters for the parts and procedures that changed.

For the RG250H, Section 9 supplies revised service data and directs you to Sections 1–8 of the RG250 manual for the underlying repair procedures.

PDF Search, Bookmarks, and Wiring Detail

Finding sections and reading diagrams: Both PDFs have bookmarks. The RG250 PDF supports text search, and four of its main bookmarks lead to the same page. The corresponding chapter subentries lead to the right sections. The RG250W PDF has no text search. Zoom in to read small wire codes in both books. The main RG250 wiring diagram has some show-through from the reverse side.

The ZIP contains two printable English-language PDFs totaling 451 pages. The counts include the covers, front matter, and publication pages, plus the 34-page RG250WE update and the six-page RG250H supplement.

Two-Stroke Engine, Chassis, and Electrical Service

These are selected workshop topics. The manuals also cover drive-chain inspection and engine break-in.

• Engine and gearbox: Step-by-step engine removal and installation, crankcase disassembly and reassembly, piston and crankshaft inspection, clutch service, and transmission shaft and shift-fork work.

• Carburetion and CCI lubrication: Carburetor overhaul, jet identification, float-height and throttle-cable adjustment, fuel-cock service, and CCI oil-pump checks, cable setting, and bleeding.

• Cooling system: Radiator and hose removal, thermostat and temperature-gauge testing, and water-pump seal and drive-gear service.

• Ignition and charging: Generator output and regulator/rectifier checks, ignition and pickup-coil testing, and diagnosis of the later RG250 automatic exhaust control unit and actuator.

• Brakes and suspension: Hydraulic brake overhaul and bleeding, front-fork service, steering-stem bearings, wheel and tire service, swingarm inspection, and Full-Floater rear suspension disassembly and reassembly.

• Workshop references: Periodic maintenance schedules, wiring diagrams, component torque tables, fluid capacities, wear limits, and troubleshooting for engine, carburetor, cooling, electrical, battery, and brake faults.

Suzuki wrote both manuals primarily for experienced mechanics and also describes them as guides for apprentices and DIY mechanics.

RG250WE Changes and Market Equipment

The update covers revised piston and cylinder selection, a clutch stack with V-rings and a wave washer, reshaped clutch pushrods, and early and late magneto rotors. It also shows revised fuel-cock routing, shim selection for the split water-pump idler gear, and checks for the E.A.C.S. air control unit and solenoid.

The E-code tables distinguish twin- and single-disc front brakes and identify the matching fork and caliper procedures, instrument and lighting differences, and market-specific fairing equipment. Match the market version before selecting a procedure or replacement part.

Engine Reassembly and Chassis Service

Engine inspection covers cylinder-head distortion, piston rings, connecting rods, bearings, and oil seals. Reassembly covers the primary drive, kick starter, gearshift mechanism, generator rotor, and final installation checks. A ring end out of position at its locating pin can catch a cylinder port during assembly and damage the piston or bore.

The RG250W anti-dive fork and the later RG250 Posi-Damp fork have separate service procedures. The brake chapters caution that high-pressure air can damage caliper pistons and that gasoline or cleaning solvent can harm hydraulic seals and cups.

Support the motorcycle securely before engine, wheel, fork, steering, or rear-suspension removal. Allow the cooling system to cool before opening it, and follow Suzuki’s brake-fluid and electrical-safety cautions during repair work.

Electrical Diagnosis, Routing, and Special Tools

Separate regulated-voltage and generator no-load tests help distinguish a generator fault from a regulator/rectifier fault. The electrical chapters also cover CDI checks, switch and lamp continuity, battery service, and combination-meter inspection. The RG250 actuator schematic accompanies the exhaust-valve operation and cable-setting checks.

Factory illustrations include transmission and crankshaft exploded views, radiator and water-pump layouts, charging and ignition circuits, a combination-meter connector view, and cable, harness, and hose routing sheets.

The tool lists identify the piston pin puller 09910-34510, clutch sleeve-hub holder 09920-53710, and rotor holder 09930-40113. Chassis tools include steering-stem nut wrench 09940-14911, fork oil-seal installer 09940-50112, and fork oil-level gauge 09943-74111. The RG250WE update specifies rotor remover 09930-30102 with attachment 09930-30190 for the late magneto rotor.

Piston Fit and Thermostat Test Examples

Standard piston-to-cylinder clearance is 0.070–0.080 mm in the base RG250 service data and 0.060–0.070 mm in the RG250H supplement. The separate tables identify which clearance applies during inspection.

The base RG250 and RG250H tables both specify thermostat opening at 65 ± 1.5°C and valve lift of at least 6 mm at 80°C. The cooling chapter covers the thermostat bench test.