I have 58 weights in and a slp pipe. I was hitting 8500 hundred sometimes 8600 for only a split second in deep deep powder. It ran amazing nuthing was reaching where i was going. I am just wondering if i am doing damage running that high rpm. I rode at a lower elevation and will ride their quite a bit around 6 to 8k. I still go up 8 to 10 k alot too. So i guess i need to switch weights like every time i go low and high is their any easy way to do this or do u have to pull the clutch.