Hey all, new to this sorta schtuff, putting a 66cc motor on a bike looks like alot of fun :O Anyways, I am considering doing this to a Wal Mart mountain bike (still need to go buy one), and I was wanting to see if its possible to do for about 300$. What engine do I need to look at? I am a bigger guy, so I know I am not gonna be hitting 40mph lol, but if I could hit 25 it would be awesome. The main thing is reliability, sorta wanna stay away from a china motor becouse I doubt they are worth a crap. Thanks!