Honda CB50 / XL50 / CB50J Workshop Manual
Technical reference spanning CB50J and XL50 models, covering engine, frame, and electrical systems with diagnostic charts and maintenance schedules. Ref: 0030Z-149-8800
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Sample pages from the Honda CB50 / XL50 / CB50J Workshop Manual manual
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Models Covered & Key Technical Specifications
Honda CB50 / XL50 / CB50J Workshop Manual: Honda Detailed Repair Manual Honda CB50 / XL50 / CB50J (0030Z-149-8800) -- Reference Repository | Dossier.
- Design Dimensional Tolerance: 0.002 mm establishes the required minimum tolerance for critical engine components.
- Advanced Output Rating: For optimal performance, 50 cc defines the engine displacement for all variants.
- Technical Working Temperature: The optimal operating temperature is between 15-30C, defining the environmental limit.
- Standard Component Weight: The engine assembly requires 18.5 kg for proper installation and handling.
- Prescribed Tension Specs: All critical bolts adhere to a torque specification of 3.0 – 3.8 kg-m for secure assembly.
- Engineered Assembly Gap: A minimum gap of 0.05 mm is required for the cylinder head assembly to prevent binding.
Professional Workshop Service Manual & Technical Specifications
Honda CB50 / XL50 / CB50J Workshop Manual: Honda Detailed Repair Manual
Engineering-Base: CB50J, XL50, CB50 / Application-Range: Bike / Motorcycle Logic // Engineering-Base: 50 cc, Air-cooled, 4-stroke
Technical Specs
| Metric | Baseline | Calibration-Standards | |
|---|---|---|---|
| Engine Type | Air-cooled 4-stroke OHC | Single cylinder 12" inclined from vertical | |
| Bore x Stroke | 42 x 35.6 mm (1.654 x 1.402 in) | 49 cc (2.99 cu.in) | |
| Compression Ratio | 9.5 : 1 | Piston valve type, 12 mm (0.47 in) | 18 mm (0.71 in) |
| Fuel Capacity | 8.5 lit. (2.24 U.S. gal, 1.88 Imp.gal) | 105 – 110 cc (3.7 – 3.8 ozs) |
Systems Documented
This workshop manual documents the service procedures for the Honda CB50J, XL50, and CB50 models. It includes detailed breakdowns of the engine, transmission, lubrication system, clutch, and generator. The frame section covers front and rear suspension, wheels, brakes, and steering systems, while electrical system coverage includes ignition, charging, and lighting circuits.
Specifications Overview
Key specifications for each model variant are provided, including engine dimensions, fuel capacity, and tire pressure. Torque values for critical fasteners are listed to ensure correct assembly and safety. Diagnostic charts offer troubleshooting guidance for common issues like starting problems or engine noise.
Introduction to Procedures
Service procedures are documented for engine removal/installation and cylinder head/valve service. Detailed instructions are provided for carburetor adjustment, cam chain tensioner maintenance, and oil filter screen cleaning. Clutch and air cleaner maintenance are also covered.
Repair Process Documentation
Calibration requirements are specified for valve tappet clearance, idle speed, and throttle cable free play. Electrical system documentation covers ignition coil testing, condenser capacity, and rectifier continuity. Suspension service documentation includes front and rear shock absorber adjustment procedures.
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