I got a free Honda express with no cylinder and some broken studs. I put a hobbit cylinder that had light porting and a hobbit piston in it. then I welded up a biturbo and removed the air filter. I rode it for about 5,000 miles it would go 40mph most times but sometimes it would seize a lot and go 26mph. I went through a lot of pistons due to shitty points but it never actually left me stranded except one time. One time I rode it on a full tank of straight gas and it seized 7 times but once i filled up it went 40 again.