Maybe I am the only one. Had an 08 XP 154 and it was horrid until I put in one of DJ's kits. But my 09 163 is running excellent. Right now 300 miles stock clutching pulling and maintaing 8100 all the way through a climb around 42-45 mph track speed in about a foot of fresh. Get on the trail wide open right about 8300. Clutches are getting pretty darn warm still, but 300 mi and belt looks great. I am sure there is room for a bit of improvement but not sure if I wanna touch it, maybe just throw in some vents and ride. So is anyone else likeing their stock setup? Oh and I am riding 7,000 to 9,000 ft.