my ztr is ridden hard alot but not too rough. During the middle of the summer i went over an invisible hole in a yard. it was a really hard bump. i then went down a hill and onto a parking lot. i looked down to see that my right front caster had broken off and was scraping across the ground!! anybody else ever have this problem?? i took it to my dealer and they welded it back together, it broke again!! i then took it to a friend's machine shop (he does some free repairs for me and i do 2 acres for $60) he welded it back. IT BROKE AGAIN!!!!!!! i took it back to him and he welded it with some wire that was made to stand up to vibration. THEN THE LEFT SIDE BROKE!!! He welded it with the same stuff and i have had no more toruble. my dealer ordered a new wheel set about 5 months ago and i havent heard anything since. i dont care though, if it aint broke dont fix it. i finally got it fixed!!