Done just about everything I can think of or find in your forums. No leaks, kind of clacky on running. No power on hills at all. Will slowly gain speed on flat ground if I feather the throttle. Will not idle at all. There are a ton of miles on this build. Throttling up does not make a bit of difference, just runs really slow with no power. New magneto, new CDI, (the old one crapped out, and burnt out the magneto on its way out the door), good spark. I live in Vermont, been running my bike in very cold conditions, including snow, and its been losing power ever since. We had a warm up week, and it was still running poorly. At this point I am leaning toward it being the piston rings, magnet, or clutch pads, but don't know how to figure out which, or if it's something I have not thought of.