Almost 15K miles on the bike and never had a problem until a week ago when i got home and noticed the rear wheel is stuck when trying to push the bike by hand to park it. Since last transmission service was done at 8K miles, I decided to just go ahead and overhaul the transmission. Found the clutch assembly nut has come undone and was rubbing against the clutch bell. After all done i test rode the bike, what a difference new parts make, it rides so smooth.