Honda CB125, CB160 Shop Manual (P/N 622161)

• Covers 1972 Honda CB125 and CB160 motorcycles, documenting engine, frame, and electrical system specifications for parallel twin-cylinder variants
• Official OEM publication (part number 622161) originally issued by Honda Motor Co., Ltd.
• Contains 149 high-resolution exploded-view diagrams, electrical schematics, and service reference tables for inspection and assembly
• Serves as the primary technical reference for 125cc and 160cc CB-series models, providing standard service limits and adjustment criteria directly from the manufacturer

Component and Assembly Overview

This factory service document organizes technical information into six distinct sections covering the engine, frame, and electrical components. Chapters detail the internal structure and assembly requirements for the parallel twin engine. You will find specific data on the crankcase, clutch, oil pump, carburetor assemblies, and fuel system layouts. The chassis section documents front and rear suspension construction, steering head maintenance, and braking system specifics. For electrical diagnostics, the manual provides wiring schematics alongside AC generator and rectifier specifications.

Specification and Reference Data

Technical specifications outline the exact performance thresholds required for accurate vehicle maintenance. When dealing with vintage motorcycle systems, strict adherence to these factory tolerances is vital to ensure safe, reliable operation on the road. The documentation lays out cylinder head bolt torque values in a clear multi-stage sequence. Need precise clearances? The cylinder head specification table lists the intake valve clearance at 0.03–0.05 mm. You will also find system diagnostic references for the AC generator ignition output, alongside fundamental data like the 1.0-liter engine oil capacity. Additionally, the text incorporates fuel consumption ratios and performance speed graphs tailored to the 130 km/h top-speed CB125 and the 135 km/h CB160.