Restoration Guide

Honda CB650

1979-1985

Key Specifications

Displacement: 627cc
Bore: 59.0 mm
Stroke: 57.8 mm
Cylinder-head torque: 29 N.m; 8 mm cap screws, 3-stage
Cam-sprocket bolt: 44 N.m
Engine sprocket nut: 64 N.m; LH thread, staked

Workshop Walkthrough

CB650 SOHC four — animated diagram walkthrough

A step-by-step animated walkthrough of the CB650 four-cylinder top-end — drain + strip, the three-stage head torque sequence, cam-chain orientation marking, and the cold valve clearance setting on all four cylinders with shim-under-bucket adjustment.

Workshop Walkthrough

Watch the on-canvas build first, then run the numbered steps below at the bench. Still frames pin to the matching step in the procedure list.

If the inline player will not start, download the walkthrough (MP4).

Family reference

CB350→CB450→CB550→CB750→CB900F Bol d'Or→Honda SOHC hub→

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