Honda CB250/CL250/CB350/CL350 1960s-1970s Shop Manual (P/N 07000-28601)

• Covers 1968 and later Honda CB250, CL250, CB350, and CL350 vertical twin-cylinder motorcycles
• Original OEM publication directly from the Honda Motor Co., Ltd. Service Division, P/N 07000-28601
• Includes 219 pages of factory technical specifications, exploded-view diagrams, and descriptive repair information

Engine and Transmission Architecture

The 1968 and later Honda twin-cylinder platform requires precise data for accurate workshop processes. This manual breaks down the complete mechanical layout of the O.H.C. air-cooled twin. You get detailed structural overviews covering engine construction, dismounting, and remounting. Specialized chapters dive into the cam case, cylinder head, and valve mechanism. Every technical section carefully explains the layout and operation of the constant-velocity Keihin carburetor, clutch assembly, and the five-speed transmission system.

Expect comprehensive data previews to support your workflow. The reference tables provide essential figures like engine performance curves and dimensional drawings. Need special tools? It lists the exact factory units required for servicing valves, pistons, and crankcase components. Cylinder head bolt torque values are strictly documented at 60-70 kg-cm, while center bearing cap bolts call for 160-210 kg-cm. Before starting any project, always verify that your workspace meets standard safety protocols, as handling heavy engine components and pressurized fluids requires proper protective gear and extreme caution.

Frame, Chassis, and Electrical Specifications

A proper motorcycle restoration goes far beyond the powertrain. Frame sections detail the handle, front fork hydraulic dampers, fuel tank maintenance, and braking system service limits. To help you trace electrical issues during a repair, the publication includes complete wiring diagrams for various market types. You will find exact 12V-12AH battery charging system characteristics, stator testing procedures, and selenium rectifier values. Coolant system capacity for standard units is noted at 2 liters, alongside precise tolerance charts for gear shift forks and wheel hub clearance.