There are a handful of guys running a jesel setup in mud racing, I have never seen any of them have a cover over the drive, but I have noticed that they are picky about what tracks they run. I don't know if the belt drive has anything to do with it but I do know they won't run sloppy tracks. I don't think that in our sport of mud racing that their is any advantage to running a belt drive. JMO. Timing chain uses the same amount of power to turn.