I have a 136" Viper ER with SLP pipes. I am heading out to West Yellowstone in a month and am looking for a decent clutch setup for 7000 - 10,000 feet. I am currently running 8EK's with 13.9mm steel rivets in both holes, stock gearing, springs and helix. SLP recommends changing gearing to 20/38, 43 degree helix and a silver secondary spring for that elevation, but I am hoping someone has a setup that works OK with stock gearing.