Seems there is a recall on all Raptors 01-04.Apparently at certain high RPM's bubbles are forming in the rear brake cylinder and a complete loss of rear brake has been happening.A dampner kit is being installed by the dealer for free to correct the problem.

got my recall in the mail yesterday, probably get it fixed sooner or later, been riding hard for 2 seasons, never had a problem, but I am going to get the "once over" at the end of the season, so I will probably get it fixed then, if I remember.