new 400ex intake setup

[sparky76]

first off great site here.


I just bought a '04 400ex and i like to run in mostly on wooded trails with a little mud/puddles and loose dirt. I just wanted to know what's the good intake setup to use without sacrificing the filters effectiveness on the loose stuff and dirt. I see a lot of K+N's out there, i just don't know how they work with the water and stuff. Also should i leave the lid alone or use something different. thanks

[WheelieMan4]

I ride in the same conditions and have a k&n with the lid off..a lil bit of dirt/mud will be at the bottom of the box when im done riding

[jak1389]

i ride those same conditions and when it is realy wet the lid is ony but when mostly dry you can run lid off with an outerwear.

[TwentyBelow131]

I run a K&N with precharger and a custom airboxlid. It looks exactly like the ehs lid, But only cost my about 25 dollars.

[Speedy81304]

same type of riding here. I have a K&N replacement filter with an outer wears, plus a K&N powerlid, (airbox lid thats a filter) with an outer wears. so i have good air flow plus double the filtering just incase. the stock intake going into the air box has been sealed up with a PVC cap and lots of silicon. runs good and sounds good you can hear the intake charging into the engine.

[2001300exguy]

i am not going to say any of you are wrong with the k&n but i hate them and will never buy one again. i just had to rebuild my bike cause a piece ofsand or something got in my cylinder and put a huge scratch in it. it may flow more air but you will never notice the difference, i say get a uni or twin air to just be safe.
also i always oiled my filter so dont say thats the problem

[jak1389]

did you put grease on the neck of it when it was put inot te boot? if not that would cause it becasue it doesnt have good tight seal.

[2001300exguy]

yea

[blue416ex]

i personally HATE K&N filters why you ask because they are GARBAGE and caused my banshee a $1200 motor rebuild crank pistons heads cylinders clutches and eerything i always run a Pro Design with the Pro Design filter its an amazing setup and i would get rid of the K&N on my 416 if i wasnt selling it

BTW K&N's are NOT good in water at all ! lol i found that out the hard way also with my first bikewhen i was 11

[jak1389]

ive only had god luck with k&ns. 2001300exguy did u have the lid off?

[2001300exguy]

no but i run a aluminum airbox with the lid on. i understand a k&n can be as good as foam if you oil it every 20 minutes but whats the point when you can have a foam and oil it every other long ride and have it still do better

[Vince44]

foam filter is a lot better;)

[coryatver]

There will never be a K&N on my bike or will I buy one that has had one.

[400exhauck]

i run a k&n and wouldnt trade it for the world:D

[vinson581]

K&N = for your car......not for mud water, or any dirt offroad. they are gauze and let most polluants through the filter easily. i have the best of luck with UNI i love them, sware by them, and never has 1 motor fail that was running them, they flow as good as a K&N and if they flow 2% less then a k and N so what...! i would sacrifice proformance anyday for a sound clean motor. your air filter is your life blood of your motor, that and changing your oil, on a stock motor those 2 things will lead to trouble free years of fun and a UNscored cylinder wall....... once a K&Ns get wet they never seem to oil well again..... the only thing i run a K&N on is my car, truck, and my onroad gas Raceing R/C car....(clever design i made )

for like 28$ GET A UNI!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!



v581

[416exbadasrider]

i personally hate k&n also i ride in muddy coal dirt conditions and i had to rebuild my ex because a piece of dirt got in the cylinder and scratched it i now run a twin air and i love it

[Speedy81304]

i have used K&N's in every thing i own. never had engine problems. as long as you clean and oil them you should never have a problem. for sealing the filter on the intake tube i always use silcon... Also even though the filter come oiled. i spray i little more on them.. I have a K&N in a 99 Ford F350 CREW CAB. with 100,000 plus miles no engine problems just clean and re-oiled every 20k miles.