what kind of power gain

[St Louis 400ex]

I just order a K&N power lid a white bros e-serries slip on and a dyno jet kit for my 400ex what kind of power gain do you think i will get and were will i feel the power the most thanks to any one that canhelp

[gotahemi2004]

i ran this setup for a while it works good. youll notice a differnece for sure. alot better tahn stock just make sur eyou run the right jet makes all the diff

[PunkA$$]

That's exactly what I've got. Make's a huge difference over stock. You'll love it!

[St Louis 400ex]

what jet seting should I use, does weather come into effect, is it hard to set the jets up, how long do you think it will take, thank you guys for your help i am new with atv's put good with a wrench

[cals400ex]

i would try a 155 Dynojet in winter and one size smaller in summer.

[gotahemi2004]

i was running a 170 main with that setup but it was too high

[PunkA$$]

Dynojet calls for a 170 with that setup. That's what I'm running now and it seem to work nicely.

[markk]

Ok i live about 60 miles straight east of STL, ANd im not running that set up, But i would start at either 155 or 160 either will probley be ok, Rember lean is fast, but dangerous!


I run a 170 in quad, and im running a full system WB E-series Port and Polish,a cam, and a UNI filter, with custom air box lid, And my spark plug looks really good, its kinda a choclate brown color, Not to much gas, not to little, I feel that u might be running a bit rich if u drop a 170 in!

[Skannes]

HELL YEAH YOUR GONNA FEEL THE POWER!