Agree with SledTL but I would do a complete rebuild on the clutches with the miles on your sled, replace bushings, pins, rollers, weights etc. and I'd do both clutches.
Old Abe there's a place up in Lena called Muel's Sled Salvage , call or text 815-821-2409. Not far from you and the first pic on his facebook has a red Formula 500 in it! Good Luck!
Snowbike is almost ready(for sale if anyone is interested), Sidewinder is in pcs. and the Venture will be getting it's maintenance done next. Damn Carpal & Cubital tunnel surgery slowed me down on getting things ready.