proc circiut t-4 slip on : what main jet and pilot

[Trickster78]

ok guys im takin my bike out this weekend riding. i just put my t-4 on last night sounds beefy but havent had a chance to ride yet and open it up. Alot of guys have been telling me that with my setup i need to run 158 main and a 42 pilot. Does this sound correct and to you all it may seem like a dumb question but how do i replace the jets inmy carb, " i know your never going to learn till you do it : i just dont want to tear anyhting up.
Mods" pro circuit t-4 slip on, k@n fliter, stock airbox, motiion pro twist throttle, dg front bumper, dg nerf bars. If yall dont mind gimme a hand . tricksters 2002 trx300ex:devil

[brian400ex]

160 main, stock pilot jet and needle moved up one notch. On the bottom of the float there is a big plug. Remove it and the main jet is right up there. The jet takes a 6mm socket.

[ill_lil_romey]

A commom myth is that you have to rejet evertime you make an upgrade to your bike. That is not true! If the bike runs fine with the stock jets and the slip on, leave if that way, you should only rejet if you absolutly must!!

[Steve-o 400EX]

Originally posted by brian400ex
160 main, stock pilot jet and needle moved up one notch. On the bottom of the float there is a big plug. Remove it and the main jet is right up there. The jet takes a 6mm socket.

I would try a 42 pilot too, this will make starting much easier.:)

[BKVIEW4U]

definitly do the 42 pilot . and i have a 160 main in mine with the same mods you have