WR400 and E series pipe

[a454elk]

Anyone run the White Borther's E series muffler/pipe on the 99 WR or YZ 400? Do you need to do any jetting or other changes after putting this on? I have the opportunity to buy one and was curious as to what it would do for me and also what a good price would be. Thanks

 

[WRFRK]

I'm running one on my '00 WR400, but it came with the bike. I can't honestly say what difference it makes as far as power, but it does sound good :thumb:

 

[a454elk]

thanks

 

[axident_prone2004]

I was also interested in jetting for it. James Dean makes some nice jetting kits. What jetting and altitude are you running wrfrk.

 

[Studboy]

a454elk,

My friend had one on his 98 YZ400.
When compared to the stock pipe, the E-series seemed to give a decent increase in mid-top end pull with plenty of torque still on tap down low.

The only downside to the pipe was the (I felt) excessive noise, even with the S/A installed.