Built this bike inside on campus university housing... How I didn't get in trouble using an angle grinder in our room I have no idea. 100% vintage parts. Bike sports a 90cc CT70 motor from 1974 that I totally rebuilt - 4 speed ATC tranny, high performance roller bearing cam, race valve springs and vesrah performance clutch springs. 12vdc regulated/rectified electrical system with phone charging capability, LED and Halogen lighting built from treats parts. 1980 CR80 front end. Pinto was crusty (all suspension seized and motor completely F'd) motor came off of craigslist for $20 and was full of water when I got it. Winter 2013 it's going under the knife for a mechanical advance SL70 ignition, manual clutch, new transmission and some frame tweaks.