I know :
Motorized Bicycle Engine Kit Parts 2 stroke 4 cycle kits REVOLUTIONCYCLES.US
Bicycle Engines, Motorized Bicycles, Bicycle Motors, Motored Bikes: 2-Stroke & 4-Stroke Kits!

but they are selling with the engine only, and I dont need it with engine because I already have one (Honda GXH50).
So i wanted to know where can I but the kit without the engine? Thanks