Suzuki RV125 VanVan 1972–1982 Service Manual

Prepared by Suzuki Motor Co., Ltd., Export Service Section, this factory service manual covers the two-stroke Suzuki RV125 VanVan with Suzuki CCI lubrication, a VM22SH carburetor, and front and rear drum brakes. Match this configuration to your motorcycle before ordering; the publication is not organized as a year-by-year revision guide.

PDF Access and Wiring Detail

Search, navigation, and diagram detail: PDF text search is not available, and there are no embedded PDF bookmarks. Small labels in the full wiring diagram require zooming; some circuit lines are faint.

The ZIP download contains one printable English PDF with 70 pages total: four preliminary pages, 63 numbered manual pages, and three appended chart pages containing the periodical inspection list, exploded engine view, and wiring diagram. All preliminary and chart pages are included in that total.

Engine, CCI, and Chassis Service

The following selected coverage highlights summarize the main workshop content rather than reproduce the full contents list. Additional topics include break-in guidance and air-cleaner element maintenance.

• Engine repair: Step-by-step engine removal, crankcase disassembly and reassembly, top-end service, crankshaft removal, clutch work, kick-starter service, and transmission repair.

• Suzuki CCI lubrication: Pump construction and drive, throttle-linked pump adjustment, oil-line bleeding, and lubrication-system preparation after engine assembly.

• Symptom-based troubleshooting: Fault-isolation tables for hard starting, abnormal engine noise, overheating, clutch trouble, gear-shifting faults, and poor stability or steering.

• Electrical testing: Ignition-timing checks, coil and condenser inspection, charging-system tests, rectifier checks, switch-contact diagrams, turn-signal relay testing, and battery service.

• Chassis service: Front-fork teardown and reassembly, brake adjustment and inspection, split-rim wheel service, wheel removal and installation, tire checks, and drive-chain maintenance.

• Factory drawings: Transmission power-flow views, the CCI lubrication diagram and oil-pump performance chart, a front-fork section, full wiring diagram, and exploded engine view.

• Workshop reference data: A 24-item special-tool list, inspection and repair specifications, component-specific tightening data, an important-functional-parts safety checklist, and the periodical inspection schedule.

Suzuki provides assembly and disassembly instructions for less-experienced mechanics alongside inspection and repair data for qualified mechanics; internal engine work calls for the specified service tools and measuring equipment.

Engine and Transmission Repair

Engine teardown includes flywheel-magneto and oil-pump removal. Assembly notes cover screw locations, crankshaft oil-seal replacement, piston and ring orientation, shift-fork identification, clutch alignment, kick-starter orientation, and transmission washer and circlip placement.

Transmission power-flow views trace neutral and each gear. The shaft assembly drawing adds tooth counts, washer dimensions, and bearing positions; countershaft service addresses the press-fit second drive gear and the checks required after reassembly.

The engine assembly notes identify unfilled CCI oil passages after rebuilding as a cause of bearing noise or piston seizure.

Carburetion, Lubrication, and Fault Isolation

The VM22SH carburetor section contains an exploded view, factory jet and needle specifications, float-level setup, idle adjustment, and mixture guidance for altitude or climate changes.

The CCI chapter traces the pump drive and oil paths, relates delivery to throttle position, and distinguishes inlet-line from outlet-line bleeding. Its adjustment notes explain the relationship between carburetor-cable setup and oil-pump control.

Troubleshooting charts connect symptoms with checks of fuel flow, spark, compression, lubrication, carbon buildup, and drivetrain condition. Steering and stability charts extend the diagnosis to wheel alignment, steering-head parts, suspension, and frame condition, helping focus repair work on the system at fault.

Ignition, Charging, and Switch Circuits

Ignition timing is checked with a dial gauge and timing tester. The fixed magneto stator makes breaker-point condition and adjustment central to the timing procedure.

Separate ignition and charging schematics support primary-coil, ignition-coil, condenser, charging-coil, lamp-coil, resistor, and rectifier tests. Inspection tables also provide lighting-output and charging-current specifications.

Internal contact diagrams distinguish ignition-switch positions and the dimmer, turn-signal, and horn circuits. Battery coverage includes initial charging, electrolyte-specific-gravity checks, and recharging.

Forks, Brakes, and Split-Rim Wheels

Rear-shock coverage explains construction and spring-load characteristics; the step-by-step suspension teardown is for the front fork. Brake inspection distinguishes front and rear shoe and drum wear limits.

Exploded wheel views identify the rim halves, gasket, brake components, and rear sprocket hardware. Split-rim instructions prohibit tire-lever removal and address inner-tube protection, gasket placement, and tire seating. Rear-wheel installation notes cover chain adjustment and joint-clip orientation.

Special Tools and Workshop Precautions

The special-tool table identifies tools by function and Suzuki part number, including crankcase separator 09910-92810, crankcase assembly tool 09910-32811, flywheel rotor remover 09930-30113, and timing gauge 09931-00112.

The important-functional-parts checklist covers fuel leaks, cracks, faulty welds, brake-lining condition, and cable-end security. Engine, wheel, brake, and electrical repair should be performed with the machine securely supported, the battery isolated where required, and the specified service tools used for the applicable operations.

Preview of Piston Clearance and Clutch Wear Data

The engine inspection table lists standard cylinder-to-piston clearance at 0.050 mm, with a service limit of 0.155 mm.

Clutch drive plates have a standard thickness of 3 mm and a replacement limit of 2.8 mm. The same inspection section includes cylinder-wear, crankshaft-runout, and clutch-plate-warp checks.