I bought a 09 Teryx from a guy moving overseas that had been dealer modified, i.e., 3" lift, Dalton Clutch and Overdrive plate, Muzzy exhaust, digi-tune, etc, etc. The clutch was set up to run 31" Silver backs on 14" ITP's. After I bought the Teryx I sold the Silverbacks and put 27" Reptiles on the 14" ITP's. (I am not an agressive mudder) Now the problem I am having is when I start to go from stop, the Teryx clutch grabs and lets go multiple times and is very jerky getting going. I think they call this "Bucking". My question is if the Dalton Clutch fly weights need to be reset for the smaller tires or is this normal for the Teryx. (I have never riden a stock one) I e-mailed Dalton with the question and asking for data sheets on the Dalton clutch, but thus far they seem uninterested in responding to my questions. Any one out there know if the clutch is the problem or the driver??