Arctic Cat makes a update chip for that model. They came original with a rich mode when you blurped the throttle for racing. The update chip, part # (3005-464) deleted that mode and cleaned up the sleds performance . Worked very well for me, had to exchange the chip with my dealer when I did this. I first tried a Black Magic "Hot Trail Chip" part# (80-1897) square. This chip seemed to work better in higher altitudes. I still have this chip if you are interested, send me an e-mail.