ANYONE reccomend a jetting sizes help on a 400ex w/ ti-4 fmf and ehs racing (outerwear)airbox lid?
I want to confirm what I have heard.
Thanks!

 

Im running a 155 main in my 400ex..W/ a WB full exhaust, K&N W/Outerwear.. And holes drilled in the airbox lid..What have you heard..

 

I run a 175 main jet with an "E" series slip on, K&N and the air box lid removed and it really woke it up over stock and the plugs look good after 25 hous.

 

Zilla you missed the topic of this thread (jetting in OKLAHOMA)

Hippy
I changed pipes I had that WB R4 and was running a 155 main(on my 400ex)
Now I have a HMF and had to go to a 165 main with holes in the lid and it is running very good