400ex carb or 300ex jet kit

[clay3007]

ok i have a 300ex with a wb header, hmf pipe hot cams stage 1 cam and modified cdi box. what will give me better gains, jetting my stock 300 carb or buying a 400ex carb

[rob_990]

is it jetted at all? if its not i wouldnt even run it.its probably way to lean.if you get a ex carb your still going to have to jet it.

[kbass24emtp]

Get an ATC 350X airboot and a 400EX carb. You will still have to rejet the carb, but you will get alot better response with the EX carb.