i have been planning on getting an 80cc engine on ebay for a while, but its hard to decide on which kit to buy. is there really a difference between the "limited edition" motor which is supposed to be better and the regular "upgraded" motor? also i was wondering how well these kits can get a 160 pound person up a hill? i live in New Hampshire so i have some pretty decent ones. thanks a lot, im looking forward to your reply!