Comprehensive Honda CB100, CL100, SL100, CB125S, CD125S & SL125 Maintenance & Repair Manual (1971-1985)

Comprehensive Service Manual for Honda 100-125cc OHC Singles (1971)

Master the maintenance and restoration of your classic Honda with this professional-grade shop manual. This guide is the definitive resource for owners of the iconic 100cc and 125cc single-cylinder OHC models, providing the technical depth required to keep these vintage machines in peak condition.

Whether you are performing a simple oil change or a complete engine overhaul, this manual delivers factory-accurate specifications and step-by-step procedures that go far beyond basic owner instructions.

Detailed Model Coverage

This manual is specifically designed for the following 1971 model year combinations:

• CB100 Super Sport (1971)
• CL100 Scrambler (1971)
• SL100 Motosport (1971)
• CB125S S-Series (1971)
• CD125S (1971)
• SL125 Motosport (1971)
• TL125 Trials (1971)

Professional Technical Data & Identification

For precise parts ordering and authentic restoration, this manual includes critical technical identifiers and performance data:

• 100cc Series: Features a 50.5 x 49.5mm bore/stroke, delivering 11.5 HP @ 11,000 rpm.
• 125cc Series: Features a 56.0 x 49.5mm bore/stroke, delivering 12.0 HP @ 9,000 rpm.
• TL125 Trials Special: Includes unique specifications for the competition-focused 122cc engine, featuring a 15-degree cylinder inclination.
• Torque Specifications: Includes essential factory values such as Cylinder Head (11.5–14.5 ft-lb) and A.C. Rotor (18.8–23.2 ft-lb).

What is Inside

This guide is organized into high-impact sections designed for easy use in the garage:

• Complete Engine Service: Detailed instructions for the OHC valvetrain, including precise tappet adjustments (0.05mm / 0.002 in) and cam chain tensioning.
• Transmission & Clutch: Full coverage of the 5-speed constant mesh transmission and the wet multi-plate clutch systems used across the series.
• Chassis & Suspension: Specific procedures for both the Diamond-type frames (CB/CL/CD) and the sporty Double Cradle frames (SL), including fork oil capacities and rear shock maintenance.
• Electrical Systems: Comprehensive wiring diagrams for every model, plus testing procedures for the selenium rectifier, A.C. generator, and ignition coils.
• Maintenance Schedules: Factory-recommended service intervals based on mileage and operating time to ensure long-term reliability.

Added Value for the Enthusiast

• Troubleshooting Guide: A dedicated section to help you quickly diagnose starting issues, engine noise, or poor high-speed performance.
• Special Tool Identification: Lists exact Honda tool numbers (e.g., 07011-03001 Dynamo Rotor Puller) required for specialized tasks.
• TL125 Supplement: Includes the specialized technical data for the Trials model, covering its unique engine configuration and competition-tuned components.

Keep your vintage Honda legend running smoothly with the only manual that combines technical precision with practical, easy-to-follow advice.

- CB100 Super Sport (1971)
- CL100 Scrambler (1971)
- SL100 Motosport (1971)
- CB125S S-Series (1971)
- CD125S (1971)
- SL125 Motosport (1971)
- TL125 Trials (1971)