1971-1985 Honda CB100, CL100, SL100, CB125S, CD125S, SL125 Service Manual

Official 1971–1985 Honda CB100–125 Service Documentation

• Covers 1971–1985 Honda CB100, CL100, SL100, CB125S, CD125S, SL125, and TL125 variants with 100cc and 125cc single-cylinder powerplants
• Original OEM publication, litho in Japan, 1971 edition
• Contains 21 detailed exploded-view diagrams, 10 electrical wiring schematics, and 14 technical specification tables
• File delivered as a direct download the moment payment clears
• Indexed PDF search covers every chapter and appendix
• Stored against your account so you can retrieve it after a hard-drive loss
• This 1971 first edition is the primary reference for the 100-125 engine family launch build

Factory Technical Scope

The 1971–1985 Honda CB100–125 service manual organizes its 101 pages into five dedicated mechanical sections supplemented by a comprehensive TL125 appendix. The initial sections prioritize maintenance procedures, covering essential adjustments for valve tappets, carburetor idle and mixture, ignition timing, and clutch free-play, along with critical inspections for engine oil, drive chain tension, and electrical system integrity.

Following the routine maintenance walkthroughs, the technical content segments the engine, chassis, and electrical systems into specific chapters. Detailed data sections explain the teardown and assembly for the clutch, transmission, and crankshaft, while chassis coverage spans the front and rear suspension, brake systems, and steering unit components. Extensive wiring diagrams for every covered model provide a clear reference for the 6V electrical charging, lighting, and ignition circuits.

Specifications and Reference Values

This 1971–1985 Honda CB100–125 publication includes critical tolerance charts for wear limits on pistons, cylinder bores, and valve seats. Cylinder compression pressure is documented at 12 kg/cm² (170 psi) in the engine specification data. Valve clearance for the intake is listed at 0.05 mm in the cylinder head specification table. The magneto pick-up coil insulation resistance is specified at 10 MΩ (measured via 1000V Megger).

Reference only — always consult a certified technician before performing service on this equipment. This factory manual provides the technical documentation and maintenance schedules for the 1971–1985 Honda CB100–125 series, detailing mechanical specifications for owners and technicians servicing the 100cc and 125cc engine families.