I am new to the motor bicycles, what is the best 2 stroke motor kits to buy. I need two of them and was going to buy a Grubee Skyhawk 66/80 and a Raw 80. What about the Black Stallion, Silver Flying Fish and the Jet all 80cc. I also am also going to build a tricycle and would like to put a 4 stroke any advice on where to get a kit for that. Please help my customer is ready to order tomorrow and is going to buy me one too. For the two motor kits I also need bikes, any suggestion on that would be appreciated. Thanks again and please reply.