My 05 450 has a significant crimp in the bend of the head pipe. It's crimped at the center of the bend and also at the frame. Looks as though they crimped/bent the pipe more than they needed to fit it by the frame? The head pipe is bent in about 35% of the diameter. I looked at some new WR's (because no 450's were in stock) and there not bent at all at the head pipe radius??? Any comments?