Twin shock/non linkage, air cooled, drum brakes without the BS. 1985 cut off for parts. So you can use a CR480/500, KX420/500, RM465/500 etc in a twin shock chassis. NO you can't convert your CR500, KX500 or RM500 into a twin shock rear end. You can use any conventional forks which were originally fitted with drum brakes, even if they came from a single shock bike. The way EVO should be using the basic guidelines of no linkage, air cooled, drum brakes. Bring on the big bore twin shocks! Sounds good, I hope we get to see some trick bikes on the track, although I doubt I'll be riding one.
Cheers,
K