Troy-Bilt 4 cycle weedeater motor on 26 inch Schwinn, Built 2 cycle 80cc, vibrated like crap, removed it and added HS142 and runs smooth. Then built a 79cc preddy on Huffy. Got bored and decided to try friction drive, mounted ok, but still need work and engine runs good. Rode it about 1 mile and decided I need to finish setup. Kill switch, throttle etc.