My buddie found a used one two years ago. Our first trip with it was to cook city in april 08. We ran it with the pipes that came with it and it really didnt seem to run any better than my 16 year old daughters stock KingCat. His sled had slp twins from his 900 motor so we brought them with us to cook. We installed them over a lunch break and ran 400 mains with stock carbs. It ran way better not as finiky but was still way rich so by the end of the day we had 360 mains yellow white primary spring, 68 gr weights, 57/52 ramp, green sno pro spring, 035 cat belt. ran great. We only had one problem with the pistons in the 08-09 season. the top ring pin was machined to high and it allowed the ring to spin and hook the exhaust port. the pin ended up being .010 to high witch allowed the ring to turn. wisco did in time give him new pistons but did not cover the plating cost.