400ex exhaust

the white brothers promeg is the best increase for the 400 ypou can getwith up to 7 hp. i've raced mined aginisted other 400's who had big gun and blew them away by 3or4 lenths

does anyone know where i can get a wav file to see what the white bros exhaust sounds like?

Do you think that the White Brothers pipe is that much louder than stock, although as loud as a four stroke gets a loud two stroke always seems to get under people's skin more.

I'll be running a complete Bill's Pipes system pretty soon. I'll keep everyone posted about the results.

http://www.geocities.com/jcrmotorsports
'00 400EX, '97 RM250

I'm getting the new FMF Powercore4 squared silencer and Hi-Flo ceramic coated header soon. Should have the silencer this coming week. A friend has last years model Powercore 4 and it is loud! At least 98db . The new version is supposed to be more quiet and produce the same power gains, which are substantial with a 152 main jet and 40 pilot jet.

Impressive!! Just got that FMF Powercore4 squared and love it. Its a different bike all together. I raised the needle a notch also with the 152 main and 40 pilot jet changes. Also have a K$N filter. Stay tuned for more when I finally get my header, its supposed to ship on the 19th.