5 speeds only. H. Choke assembly may be removed. I. Engine must remain air cooled. J. Engines must use cast iron cylinder sleeve. K. Engines must not be supercharged or turbocharged.
Any frame is acceptable as long as it is constructed in a workmanlike manner.
B. magnesium and Titanium materials are not acceptable for any engine or chassis components. D. Wire spoked wheels are mandatory. If a battery is used, it must be a lead acid type. If any reinforced plastic is used it must be fiberglass and polyester resin. This specifically intends to BAN Kevlar, carbon fiber, etc.