Honda CB350F/CB400F Four 1975-78 Service & Repair Manual

• Covers the 1975–1978 Honda CB350F and CB400F Four models, establishing comprehensive baseline standards for engine, frame, and electrical service
• Based on the 1972 factory publication, which dictates the primary technical parameters utilized throughout the entire 1975–1978 production run
• Features 32 exploded-view diagrams and 12 electrical system schematics to ensure precise component identification during teardowns

Mechanical and Electrical System Coverage

Focusing on the 4-cylinder O.H.C. engine architecture, this manual breaks down core maintenance groups. You will find dedicated technical chapters detailing the teardown and rebuild process for the cylinder head, camshaft, pistons, and primary drive chain. Need to dig into the transmission? It outlines the entire assembly process, right down to the gear shift mechanisms and primary shaft configurations. The frame section is equally detailed, walking through wheel maintenance, steering stem adjustments, and front disc brake servicing.

On the electrical side, the documentation delivers a complete breakdown of the charging circuit. This includes specifics on the 3-phase A-C generator and the Tirrill-type voltage regulator. The guide also details ignition system timing, starting motor characteristics, and main switch continuity tests to keep the 12V system running perfectly.

Specification and Data Preview

Having accurate numbers is critical when wrenching on vintage motorcycles. Assembly data lists torque values for engine covers at 70–110 kg-cm (5.1–8.0 lbs-ft), while cylinder head bolts require exactly 200 kg-cm (14.5 lbs-ft). Intake valve clearance sits tight at 0.05 mm, and standard oil changes take 3.5 liters. Because working on classic machines involves inherent mechanical risks and high-tension components, always cross-check these values and ensure you have the proper technical background or professional supervision before starting any project.