The Comet GT250 and GT125, produced around the 2002 model year, are sporty motorcycles designed for both spirited riding and everyday use. These V-twin powered machines offer a distinctive styling and a reliable platform for riders. Known for their accessible performance and the characteristic sound of their V-twin engines, the Comet series provides an engaging riding experience. The GT250, with its 249 cc displacement, and the GT125, featuring a 124 cc engine, cater to different rider needs while sharing the core design and engineering principles. This comprehensive workshop service and repair manual is your definitive guide to maintaining and repairing your Comet GT250 or GT125. It covers all essential aspects, including detailed scheduled maintenance procedures, routine servicing, and in-depth repair information for the engine, transmission, brakes, suspension, electrical systems, and chassis. The manual also provides guidance on troubleshooting, fault code diagnosis, and engine performance tuning, complete with hundreds of illustrations and detailed wiring diagrams. Whether you are a DIY owner or a professional technician, this manual is designed to empower you with the knowledge needed to keep your motorcycle in optimal condition.