426ex

[bigH]

i am putting my entire engine back into the ex tonight and should have the Quad completely dialed in by saturday...with my old set up i had a 155 jet which worked well but now that im 10cc up and a stage up in the cam along with a aluminium airbox. what should my jetting change to? im thinking a 165 but im not sure. i know i am going to have to mess with it alot but i want your guys opinions as well.
-thanks.

[honda400ex2003]

I think it will be bigger than that but i am unsure also. I run a 170 with my 416. I would say that at least a 175 would be good but i would check out the jetting thread and see what some other guys with 426's are running. steve

[Gibson]

My jetting didnt change when i rebuilt. I actually had to drop my needle one slot cause it was running too rich.