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:Engine types covered: Two-stroke 50cc 1E40QMA; 1PE40QMB; 1E40QMB; Four-stroke 50cc 139QMB and QMA; Four-stroke 125cc 152QMI; Four-stroke 150cc 157QMJ.