2010 Teryx 750. For the past couple of years I have been experiencing a nasty, Very loud grinding noise that occurs only while going downhill with no throttle - with engine braking occurring. Does it in both 2 and 4 wd and on dirt and paved road. It appears to come from the drive side of the motor. I had my shop check it out (not a Kawasaki dealer) and he really could not Find anything. He replaced the belt, checked and adjusted the clutch, checked the engine braking mechanism. Couldn’t find anything out of spec? Any one else run into this?