I ordered a Graydon pipe for my 400EX and was wondering if anyone else and one? If so how is it holding up and what kind jetting are you using?
After reading what the boys who put one on their DS650s had to say about them I'm not sure I ordered from the right company.

 

I had the Graydon Pipe on my 400 it is a good pipe and you will notice a differance it pulls stong throug the mid. I don't have it anymore I now run a TC pipe on mine it has more pop on the bottom end and pulls stong all the way through but I still think you will be happy with the Graydon pipe.