hmf slip on jeting

[rancher350rider]

i was going to get a big gun full pipe but the guy backed out so im geting a hmf and im geting a k&n air filter
now they r sending me a a 175 jet

here is what hmf says
http://hmfengineering.com/forums/showthread.php?t=57

also my see level where i live is like 3 above
so would this be to rich for my atv

[400eXr1d3rZ]

id try about 155 - 160 and 42 pilot jet

[04'400ex'er]

Forget what HMFs website says. the bike wont even run with those specs, but notice it wont burn up either so they are covered on that...:p

Without the airbox lid, run a 42 pilot jet and somewhere between a 155-165 but no bigger for sure. I would start with a 158 if it was me but it could possibly take a 155. Call 866-HMF-PIPE and ask them what they suggest at your altitude with your mods. they will get you VERY close and are very helpful.

[rancher350rider]

i kinda want to run it with the lid on the air box what would jets would i use then

[b_watts3]

well all i am using is a 152 main...someone told me that if i went any higher or used pilot it would make it to rich..so far its workin

[400EXride]

I have a 05' 400ex and I am running an hmf slip on with a k&n air intake and the lid on. I run a 42 pilot and 152 main as HMF recommended and it runs great. Have been running it this way for a year now with zero problems. Quad runs like a bat out of #*$^$. It also starts much easier with the 42 pilot..................