The round unit with a sprocket on it is a clutch. The big square thing is a cylinder head. The black tube appears to be a custom exhaust pipe. And last, the shiney rectangular thing appears to be a bracket for a brake cable. You weld the bracket on your frame near the rear tire and it keeps the cable stationary with inside cable sliding through the bracket. That's how you learn supermario, by asking! Good luck kid!!
Together we stand-Divided we fall. Mini's forever!
