by JimDirt » Wed Aug 14, 2013 12:28 pm
Thats what it sounds like , have you drained/checked the oil in the tranny/clutch side ??
You need to make sure it was not low , and make sure there is no metal shaving (excessive)
Most likey you will need a clutch rebuild kit (new plates/fibers)
Did the lever feel funny after you noticed the rev-ving ??
2020 CRF450R
2006 CRF450X

Weiser , Idaho