my fathers magnum swing arm began klunking yesterday during a short ride. we stopped to look at it and where the swing arm connects to the frame has become very loose. i am assuming that there is a sealed bearing in there that has gone bad. it is a different set up than what is on my trailboss so i am looking for some help on how to fix it. unfortunatly we are leaving for rangely today to do some riding and now it looks like he will be renting one. (i didn't think it would be good to ride his in its condition)