I had 2 MCX 1200's. Both were small 180 kits, but we built a few 250's as well. The 180's were flawless. One we still have, the other I sold as it was simply time for a change. I ran that machine with a 146 x 2.3 and most of the time went anywhere anyone else I rode with went on a 154/163. I sold that machine with 3000 miles on it, our other one had 4800 miles on it. Turbo was installed at 600 miles. I spent one day setting up the wastegate, after that it was add fuel, check oil, pull and go. I never had anything break, bend, shear, hell, the first belt I changed at 1500 miles after abusing it to no end trying countless gearing and clutching setups in dry/wet snow.
Problems I did find - heat - the panels are too tight on these machines. No matter if you go water-air, air-air, or no intercooler (no idea why this is even being sold) the panels need venting...there is so much heat that comes out from under the hood and it has no where to go.
Other problems - chain stretch - I could get close to a half inch out of the tensioner per year if I started with a new chain. They should have stuck with the wider chain design from the 07 XRS.
I'm on a 800 Etec this year. I wanted another 4 stroke, but couldn't hold out another year waiting for a 1200 replacement (it's in model year 6 now). If we don't see one in spring, I'll probably scoop up a low mileage used one..they go pretty cheap and build another. Ideally, I wouldn't decompress. Throttle response takes too big of a hit IMO. I would build another 180 kit (they actually spit out about 220), water-air airbox and Motec the thing so I could run any fuel I wanted to it. In my mind this would be a bulletproof setup...not the most economically efficient setup, but it would flatout work.
Yeah I always run around 16-20 on 110 pretty fun. You run a 2871?
