If you are making modifications to your motor or changing the altitude where you're riding, you need to change the gram weight in your primary clutch flyweights.
For the fits POL P85 drive clutch, Venom Products makes this easy with the 10 series billet shift weights.
Venom 10 series billet shift weights maintain a closer tolerance to mass spec than the powdered metal style weights and have a premium bushing in the pin bore.
If you need to increase your RPM at full throttle, you need to lower the gram weight in your flyweights.
Our testing has shown that you need to lower gram weight by 6 grams per weight if you go from sea level to 6000-9000 feet and 8 grams if you go above 9000 feet in a two stroke 800.
Always refer to manufacturers recommendations for altitude setups.
Application: fits POL P85 drive clutch equipped snowmobiles `00 +.


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