what are shift kits all about... i dont realy understand how the engine gos without the pedels going around in the first place. how do the shift kits work?
and what about single gear bikes with rear drifter breaks? can those be used for the motor mod? do you keep that rear break functioning?
and what about single gear bikes with rear drifter breaks? can those be used for the motor mod? do you keep that rear break functioning?
