With a Haynes Manual, you can do it yourself, from simple maintenance to full repairs. Every Manual is based on a complete stripdown. Our authors and technicians work out the best methods to do a job and present this with the home mechanic in mind. Our Manuals have clear instructions and hundreds of photographs that show each step. Whether you're a beginner or a competent mechanic, you can save money with Haynes., Each Manual includes:, Clear and easy to follow page layout, Full procedures written from hands-on experience, Easy-to-follow photos, Faultfinding information, How to make special tools, Colour wiring diagrams (where available).Specific Models Covered:CB250N 249cc 78-79; CB250NA 249cc 79-81; CB250NB 249cc 81-82; CB250NDB 249cc 81-82; CB250NDC 249cc 82-84; CB400N 395cc 78-79; CB400NA 395cc 79-81; CB400NB 395cc 81-82; CB400NC 395cc 82-84.