I am getting some motor work done on my 400EX for a christmas present. I want to purchase a full exhaust system for it also but I'm not sure what to buy. I was lookin at LRD and Graydon Proline. Does anyone have any opinions oh either of these pipes or another one? I would really appreciate an info.

 

They are both extremely loud. if you are not concerned about the noise factor, the big gun and Yoshimura pipes are nice. My friends have these pipes and they love them. If you want quit the FMF powercore quiet version with the head pipe is a good combo.

 

go with the Curtis Sparks system. Hands down best system on the market. I like my LRD system, but it is second best to the sparks.

 

I have had both the Sparks and the WB system and both of them are very good. The sparks is the best but it is very loud and you must use there head pipe. The WB you can get by with just the stock headpipe, but clean up the inside of the headpipe on the welds to increase the flow. If you look at any of the test on exhausts it rates them as the best. Be caefull, some cost much money and give you very little.