1996 ultra with psi pipes, square almond primary spring with a blue silver in the secondary 2nd hole. This machine taps out off the start at approx 8800m rpm and rips, then across the field comes back to around 83-8400 sometimes lower. I am looking for it to hold 8600. It has 10 56 weights and a stock helix. This problem was a lot more intense before putting in the almond primary, which helped a lot, and the blue silver secondary helps a lot too but it has to be wound up pretty tight to get it to hit and hold its revs for any length of time, but why wont the machine hold 8600 consistently? Any help is greatly appreciated, I have been dealing with this problem for awhile now and its running better than ever, but I need these revs to hold.