May Run, No Time to jet... or is there?

[Don_Carnage]

Hey, I need help jetting my 99 400EX. I know it's tired but I am going to be getting my crankcase back from the dealer with a new output shaft for the front sprocket:mad: but while it's apart i'm throwing in a CR188 Wiseco Rod kit, it has been bored one size, stage 1 hot cam, 14 T frt. sprocket and new clutch, full pro-circuit t-4, k&n filter with the lid ON and a dynojet kit. BUT I DON'T KNOW WHAT JETS TO USE, I am right on the coast and weigh 150 LBS and ride in the woods.

Any help would be appreciated, I've got 7 days to turn my crankcase into a 400EX worthy of some martin-head(if you know it) sand dragging.

"Go BIG, Or Go The F!@# Home!"

[cals400ex]

from what you told us i would start with a 160 or 165 dynojet and work your way down.

[BrooKLyN400EX]

I live in staten island not a big elevation change and i actually ride in jersey alot my bike has all the stuff listed under and i run a 158 and the power is snappy...no hesitation...try a 158 and work your way down cuz u wont need it....get a 162, 158, 152, 148. in a kit...they are cheap anyway.......by the way do u go to chadsworth?????

[cals400ex]

Originally posted by BrooKLyN400EX
I live in staten island not a big elevation change and i actually ride in jersey alot my bike has all the stuff listed under and i run a 158 and the power is snappy...no hesitation...try a 158 and work your way down cuz u wont need it....get a 162, 158, 152, 148. in a kit...they are cheap anyway.......by the way do u go to chadsworth?????

your referring to keihin jets. he is using dynojets. the numbering pattern is different on each brand.

[hondarider2006]

If you are using the kit....try a 155 and 160