i got a 2000 blaster with a stock pipe and it has had a loud rattle for a few days and couldnt figure out what it was till my buddy started shaking the quad back and fourth u can hear a piece of metal boucing around in the pipe it sounds like one good sized piece not a bunch of small pieces could it just be the baffle broke off? because i was told it could be crank bearings but it only sounds like one piece but does highly resemble the sound of a ball bearing in a paint can. anyone got any ideas? :-/