I've recently head some talk here about checking and replacing fork bushings on Yamahas. I have a 1996 YZ125 and am wondering, how would I know if I need new bushings or not? I looked on the Yamaha of Troy website and I couldn't tell which piece on the fork diagram was the bushing. When I take the tubes apart to change a seal is it easy to replace the bushing then? Are there any special tools needed other than what is needed to replace a fork seal?? How much does a bushing cost and what is the bushings purpose??