I own a '98 ZRT 600 that I bought new in '99. This was my very first sled that I have owned. In the last 7 months I have paid my sled off and now I am looking into adding some performance mods. I havent had any trouble with my sled except for last season when my chokes were freezing. Anyway, what should I do first? My track isnt studded and I know that I should stud it. How many should I go? I live in Northern Michigan and I do mostly trail riding. I have heard that too little can ruin the track but too many can effect performance. So whats the safe side? 144.... 196? Other then adding gas, injection oil, and scheduled maintenance on the sled I really have no clue what is available for other parts. Any suggestions???