Hey, I've been contemplating building a new bike for a while. And, i've herd about people building bike over 80cc before but i can't find any kits bigger than 80cc. I really want to build one out of a 200cc 4 stroke. It seems like the perfect mixture of speed and torque. I want to mount it in the frame but i could put it behind the seat. If there are kits for bigger than 80 could someone please tell me. If not can somebody tell me what to get and what to do. I'm not entirely sure what to do. Thanks.