hi i have a uncalibrated comet 4-pro clutch on a 2002 skidoo 800 with a rk tech 830 kit. was wondering what gram cam arm to start out with also color of spring. live at 5000ft sled 6000 to 10,000 also have an arctic cat secondary thanks for your time...floyd

there should be a comet chart for that or tech line.

If you can't find an answer try with what you have in your old clutch for spring compression and add up the grams of weights in your clutch and divide by four.