Hi all, Ive been helping a friend get this sled running, he picked it up for a good price but it needs alot of tlc. Anyway, we pulled the carbs apart and cleaned'em up, siphoned out the old gas and put in new, basic stuff. Started the sled, ran like a raped ape, real crisp and clean. Next day we go out start it and it wont rev past 3100 rpm's. We've done this several times now. The sled will start and run great when its cold, well let it warm up than kill it, start it up after a few, wont rev past 3100. The funny part is that it will sit there and idle perfect, cold or warm. Almost acts as though it has a rev limiter. Got good spark and fuel, just at the limits of what to do next. Anyone have any idea? Thanks in advance!