jetting

[flaccidracing]

i have a 03 400ex. i ride at lower elavation. the bike has a full big gun exhaust and rev box, no lid on air box. the main jet was a 170. i just installed a hot cams stage 1 cam and now it runs too lean, what size jet should i start with? i'm a rookie so i dont know shi#!

[bansheexcracer2]

i would start 2 sizes bigger. then if it runs too rich go down 1 size. if it is still too lean go up 1 more.