We have a 18 High Country that has had reverse stalling problems since we had to remove team clutch to install a new thermostat. The old team clutch had the bearing in between the sheves go so we bought a new adapt clutch and the same thing is happening..,machine stalls in reverse and we thing the bearing in between the sheves is sticking again after maybe 500 miles of powder riding...my son tells me this is common (his sled). Does anyone here have a fix or can explain the problem? I know Yamaha clutching but don't know a lot about the newer AC clutches...help! lol