I have a 2006 Honda Rancher 400. I get a loud noise that is coming from the motor area. To me it sounds like the clutch was slipping. I replaced every part in the clutch, went out and after about an hour of riding the noise came back. I took it easy for awhile and then pushed it to the max and that's when that noise came back. So it seems that this noise only happens after the RPM's are high for an extended period of time. The noise that I get does not happen when I am in Nautral. So it's not a motor issue, it has to be something in the drive system. When I heard this noise the first time it was about 5 degrees outside and last weekend it was about 30 degrees. Any information on this type of issue would be greatly apprieciated.