recomendation on jetting for cam and piston

[rap169]

ok i installed a wb race cam and weisco piston in my 250x. I am currently running a 135 main jet. Any recomendations to what size jet to go up to? I think i have a 138 jet. but dont have anythng larger. Just looking for a range to go by so i dont have to buy a ton of jets. Also, does anyone know if a 400ex carb is a good investment?

[cals400ex]

i don't think you would need to go up on the main much. one size up, a 138, may be the ticket. however, there is a big discussion on whether you would even change jetting from a cam and piston combo. from what i hear, you would gain top speed with the 400ex carb.

[rap169]

bumpo