Mike, I believe the RIM's were pretty similar to the Max IV's in gearing, except the RIM's had a 484cc Chapparal twin two stroke which made them quite fast for big machines..........around 35-40mph I believe. You will have to ask Mike C that after he gets the correct belt on his machine. Mike C has been known to pilot 6x6's at crazy high speeds!
"Looks like you have a problem with your 4 wheeler........you're missin' two wheels there"