Far better than ordinary repair manuals because of it's precise information. This is what professionals use in their workshops. An absolute must for every scooterist who wants to do a job on his own once in a while The books are available for individual models. Covers basic structure, electrical systems, chassis and usage of motors. The books are available for indivual motor types as well, covered in complete detail. Although these books are available for a limited amount of models, motors are constructed on the same basic universal principles. A very versatile publication, because all chassis, brakes, etc. are similar.