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Its a little bearing that sits inside the variator that the belt rides on at idle
Tuning your stock variator just became easy
This Ciao in particular is dual-variated from the factory which is great for hills and city commuting
Blew up a crank bearing in your race bike
HPI Inner Rotor CDI for Puch, Tomos, Sachs, and Derbi stock Its a little bearing thatHPI inner rotor CDI for so many bikes. These are designed for Puch E50 Z50 ZA50 engines but can fit Tomos A35 and A55, Sachs 505, Derbi Piston Port Pyramid Reed Flat Reed, and more with minimal or no modifications. Lightweight rotor, built in ignition curve, and you can adjust the stator without pulling the flywheel. Its a pretty great setup. Stator color may vary. Usually they are red, black, or gold. ******These do NOT come with a lighting coil! You
