I have the same set up as you do, Hindle power up kit, air box mod, pcv, all from Hurricane. To-day was the first day it ran well. I am using the clutch on the cheap set-up, 8fp weights with 3.5 in the tip only, gwg spring with 3 spacers at 1mm each, pink spring in the secondary at 6-1 wrap. It never worked that well until to-day, when I installed a 46-40 Dalton helix, with three washers, then it came to life. It pulls hard all the way to a top speed of 100mph. This speed was on a hard packed trail, not ice. My sled is a DX LTX with 650miles on it. Hope this helps and by the way I also have a Ulmer's clutch kit. Sorry I forgot I run machined clutches with a 8dn belt.