This manual provides comprehensive guidance for the maintenance and repair of Honda CB/CM400 motorcycles from 1978 to 1981. It details step-by-step instructions, supported by exploded illustrations and diagrams, to assist owners in keeping their vehicles in optimal condition. Published by Honda, it contains the same information used by Honda mechanics and technicians, aiming to save owners money on service and repairs.

This service manual is presented as an authoritative resource, directly from Honda, intended for owners and technicians alike. Its value lies in providing detailed, factory-approved information to ensure proper maintenance and repair of specific motorcycle models. The manual's structure, with step-by-step instructions and diagrams, suggests a practical and user-friendly approach to vehicle upkeep.