Tomos A35, A-35, Targa, Targa LX, Targa TT, Sprint, Colibri, Golden Bullet, TX50, Revival with an A35 engine (if you don't know what engine you have, please send your YEAR, MAKE and MODEL and we will determine it for you)Tomos A55, A-55, Arrow, Streetmate, Streetmate R, Revival, Revival TS, Targa, Targa LX, Sprint, ST with an A55 engine (if you don't know what engine you have, please send your YEAR, MAKE and MODEL and we will determine it for you) Tomos Nitro 150 Eton Scooters (check specs) Puch E50 One Speed Engines, Maxi, Maxi Sport, Maxi Luxe, Newport Puch ZA50 - Output Shaft Only Sears Free Spirit, J.C. Penney Pinto, Kromag Peugot, Derbi (check specs - Mag Side Only) Morini M1, M01, M2, M02 Yamaha QT50, QT-50