My buddy just picked up his 05 900 RMK 151. It is clutched right now for altitude. To be honest I don't even know what is in there right now. He did get a set of 74 gram weights. This sled will be ridden in the U.P. with 90% of that riding off trail, hence the RMK. I need to know what you Fusion guys are running for clutch weights and helix and springs. Not looking for a lake race set up. He would probably be happy with the stock 900 Fusion set up. I just read through 32 pages of stuff here. Didn't really come across a good set up. Looks like 76 grams for a start. The sled has 332 miles on it, and all the updates have been done. Bought it up at Haydays for $6299, with one year full sled warranty and two year engine warranty. Thanks in advance guys. Later, Sxrlar.