HELP ASAP!! jetting questions for my 04 yz 250

[dnchevyman]

Hi guys! heres whats going on. i blew my bike up and now im putting it back together. had the cylinder ported by ALBA, v-force reed vlaves put int, and upgraded to an fmf fatty pipe from the stock pipe. my question is. what range of jets should i have to adjust my carb??

just for the pipe fmf suggests

178 main
50 pilot
stock needle
3rd clip position
air screw 1.5 out.

please please please!!! any help would be appreciated. just want to have the stuff needed so my buddy can jet it for me.

THANKS A MILLION!!!!

 

[Benny477]

I was in the same boat as you when I put on a pc pipe and silencer. I`ve found out you need to run race gas on yz`s if you put on a pipe or have any engine work done. I mix half VP C12 and half pump gas with excellent results at a 40 to 1 ratio. Pc told me to run a 175 main and 48 pilot with stock needle in the 3rd position,air screw 1 to 1.25 out. Hopefully you have access to race gas in your area,I`ve run this all winter with excellent results.