Ok, got home last night after a 50 mile ride in up to 18" of fresh. Rode 6500' up to 8k'. My sled has the updates done and is a stock 800 retro 153. No venting, clutching, ect. I have about 200 miles on my original 083 and it gets pretty damn hot, but has stayed together so far. Started my day on my 083 for about 10 miles telling myself that I was gonna break in the 084 as nicely as possible, not breaking trail all day. Then I said F-IT and threw on the 084. Did about 40 hard miles, lots of WOT. It did seem so slip a little less and grab better especially in the high RPM's. Did I loose RPM's ? Maybe a hundred or so but was not really noticable as she was pulling hard. 084 looks perfect after my ride. The best part is the belt temp was NOTICEABLY cooler! We are getting nailed with the biggest storm of the year right now and should have 6+ feet of fresh by my next ride on Friday, so will update again later. Thanks