I just noticed yesterday that my frame is cracked along the lower weld where the stem meets the lower tube. It's cracked along the entire weld and has started to spread through the lower tube. Has anyone heard of this happening before? Any feedback would be greatly appreciated. P.S. I suggest that anyone who rides motocross with their 450 check this area carefully, because the result of a complete failure in this area would not be pretty! If you see oil leaking from this area check it immediately so you can get it repaired. If not it'll get as bad as mine and you'll have to get a new frame like I do.