jetting

[yel400]

400ex stock except hmf full system exhaust and k&n filter what do yall think on jet sizes

[cals400ex]

air box lid on or off? what elevation you at? what temperature are you riding is right now?

[throwinitup]

hey cals whats goin on...i belive i have my bike jetted right..but what do you suggest

stock motor
big gun full race chopped down to 8"
K&N filter
lid with holes
elevation around 1000-1200 feet


it runs really good right now with a stock pilot and 158 main and the clip dropped one spot....

[nosliw]

Originally posted by yel400
400ex stock except hmf full system exhaust and k&n filter what do yall think on jet sizes

try a 152 or 155 main
move the needle eclip to second from bottom position
put in a 42pilot jet while your in there

[brian-250]

Originally posted by nosliw
try a 152 or 155 main
move the needle eclip to second from bottom position
put in a 42pilot jet while your in there


i can run a 152 with my stock pipe and stuff, try a 155 or a 158.

[cals400ex]

Originally posted by throwinitup
hey cals whats goin on...i belive i have my bike jetted right..but what do you suggest

stock motor
big gun full race chopped down to 8"
K&N filter
lid with holes
elevation around 1000-1200 feet


it runs really good right now with a stock pilot and 158 main and the clip dropped one spot....


your running the exact jetting i would start with. however, i would consider a 42 pilot jet.

[yel400]

cal, lid on air, box under 2000ft, and right now it is 50 degrees F