Anyone know the ROT (rule of thumb) for adding weight to the primary? *How many rpms roughly can I expect to go down per gram of weight added to each arm? *Sled is 02 800. I believe the Ski-doo race manual had a basic formula in it but I don't have one right now.

MachZ990, The higher the rpm the more it effects rpm. *I use a rule of thumb for mine at 8000 rpm. * 1 gram=approximately 100-150 rpm's, *this is not always true, but very close. *I have not tested pin weight in the 800's though. *I'm thinking it should be very close.