426 Jetting

[426kidz]

ok guys, I know this is prob somewhere on here but cant find it for my exact bike.... I need too know the perfect jetting for a 2000 400ex that is now a 426ex. no air lid, stage 2 hotcam, wisco 11:1 high compression piston, HMF full system(sport), K&N air filter,stock carb. Now I think those are the only thing I have done that will affect the jetting... cometic gasket kit and gt thunder HD studs prob wont make a big differance. anyone know what I need? thanks alot!

[PaRedneckRiders]

Jetting is just something you have to try and try again until its right. There are more factors in jetting than just your mods, it also includes temps. you ride at and Elevation

I would say 42 pilot and maybe a 170 main should get you in the ball park.

I never had my 426 jetted right with the stock carb im running the 450 carb so if someone else keys in they may know something a little better.

[AtvKid4Eva]

HMFs site says start with a 180 main and go from there...up to a 200 main.. so if you get a 180 keihn main jet youll be good to go :blah: