Honda C65, C65M, S65 Service Manual
Step-by-step instructions for servicing the Honda C65, C65M, and S65 models, covering engine, frame, and electrical systems. Publication No. 07900-1180000.
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Honda Models Covered & Key Technical Specifications
Models: Honda C65, C65M, S65, C50, C50M, S50, C50MK1, CL70, C70, C70M
Sub-models / Variants: C50, C50M, C50MK1, C65, C65M, S50, S65, C70, C70M
Trade Names: Cub 50
Serial Numbers: C70-D049302, F No. C70-1062706, F No. C70M-M051462, F No. CD70-116607
Technical Data:
- Engine type: Overhead Camshaft (O.H.C.) 4-stroke
- Cylinder head torque: 90–120 kg-cm (6.5–9.0 ft-lbs)
- Transmission: 3-speed (C50, C50M, C65, C65M) and 4-speed (S50, S65)
- Standard compression pressure: 12 kg/cm² (170 lb/in²)
- Ignition timing: 15° ± 1.5° at 2500 rpm
- Battery: MBC 1-6 6V, 2AH (10-hour rate)
- Spark plug gap: 0.6–0.7 mm (0.024–0.028 in)
- Chain drive type: RK420-B high strength chain
- Tire size: 2.25-17/4PR
Honda Manual Features & Content Preview
Honda C65, C65M, and S65 Workshop Documentation
- Covers 1960s Honda C65, C65M, and S65 lightweight motorcycles, including supplementary information for C50, S50, and CL70 series variants
- Official Honda Motor Co., Ltd. service publication 07900-1180000, detailing original factory specifications and maintenance parameters
- Features 100 pages of illustrated technical content, including exploded-view diagrams of the O.H.C. engine, transmission, and carburetion systems
- Delivers direct access the moment payment clears, compatible with any modern digital device for shop-floor convenience
- Files are indexed for quick retrieval of engine, electrical, and frame specifications using standard PDF search tools
- Includes specialized technical chapters on the 6V electrical system, selenium rectifier handling, and centrifugal oil filtration principles
- Contains detailed carburetor setting tables for C65, C50, and S65 models to assist in fine-tuning fuel delivery across various operating conditions
- This official reference provides the original factory-specified torque values and wear limits required to maintain the 4-stroke O.H.C. engine platform used across the Honda 50 and 65 series.
Engine and Chassis Technical Scope
This Honda C65, C65M, and S65 workshop manual documents the foundational service procedures for the O.H.C. engine and pressed-steel frame construction. The content spans complete disassembly and assembly protocols for the engine block, clutch assembly, 3-speed or 4-speed transmissions, and the self-adjusting cam chain tensioner system. Additional sections detail the front fork, rear cushion dampening, and the braking system, providing specialized data for wheel rim alignment and brake shoe inspection.
Electrical and Maintenance Data
Electrical and Maintenance Data
The Honda C65, C65M, and S65 electrical section provides performance charts for the A.C. generator, battery charging intervals, and spark plug heat range selection. Spark plug reach for the intake and exhaust valves is documented at 0.7 mm. The standard compression pressure is listed at 12 kg/cm² (170 lb/in²) in the periodic adjustment chapter. The selenium rectifier testing procedure is outlined for maintaining the 6V electrical balance. For additional context on what an OEM service publication covers, refer to the professional reference guides. An official 100-page Honda OEM workshop manual covering the C65, C65M, and S65 series, documenting engine, chassis, electrical, and carburetor specifications for the classic 65-series platform.
Document Reference: Honda publication 07900-1180000
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