I've had my 550 for a year with regular oil changes and really no problems. Until now. Had to replace drive belt and brake pads because of first time rider issues. (Towing in high gear, constant passengers, etc..) Now there is a pretty high pitch whining coming from the front. Only does it high gear when I run it over 30km/hr and gets louder the faster I go. Only makes the sound while actually driving. No matter how high she revs in neutral there is no whining. Any ideas?