I had wahl bros 7tooth 3.0 pitch driver on my 97 summit turning an arctic cat challenger 153 track and the driver vibrated pretty badly rode for a year or 2 with stock drivers that were worn before I extended from 136 the the 153 and had nics on them and stock driver were smooth ridin, everytime someone rode my sled they would always ask me, whats that bad vibration in your sled?, I changed replaced the track and driver to another set of stock ones No Vibration, If I had it to do again I would buy the Avid`s never heard any probs like this with them but have read alot of the others having same prob I did.
I know the Wahls aren`t inexpensive but they sure are cheap.. I didn`t like them
just my 02
Good Luck, Wildcard