The first 2-wheeled, motorized vehicle I owned. It had a 5HP B/S engine, centrifugal clutch and springed suspension, although with no damping. The gear ratio could be modified to about 0 different positions by moving the lever at top of frame. This was the BEST of the lawn-mower engined mini-bikes I have even seen. I paid about $100 used for it in 1970 when I was 11 yrs old (Picture is of someone elses – mine was in much better shape than this)