1999 Polaris 500 sportsman atv. Yeah, I ground off the rivets on the rear brake rotor using a grinder, and ordered a replacement disc, which will bolt on. My mistake was just jumping on and riding without doing a pre-flight check, and thereby wearing out the brake pads and grinding metal on metal. Bruce: about your password: When you get to the point where even Cialis won't help, then you use ancient passwords.......like "wagonrd."