What is your favorite brand Air Filter? With What Intake Mods? [Archive]

JOEX

06-14-2003, 05:51 PM

I went on a short riding trip to Central Oregon this week in a moderatly dusty area. After an hour or so of riding I took off the air filter (K&N w/ Outerwares) and there was a layer of very fine dust in the intake boot. Not too pleased about that. It was recently cleaned and oiled.

I don't think it will make much of a difference in the short term/occassional riding in the dusty areas. But if riding in dusty areas on a regular basis one might consider another filter set up.

I think i'll be be giving UNI a try for longevity/reliability reasons. I'm not too concerened about squeezing every last hp/airflow our of the motor. JMO

Joe

Diedrich

06-14-2003, 06:22 PM

k&n, outerwear, and 6 uni vents

RIDER11X

06-14-2003, 06:52 PM

Originally posted by JOEX
I went on a short riding trip to Central Oregon this week in a moderatly dusty area. After an hour or so of riding I took off the air filter (K&N w/ Outerwares) and there was a layer of very fine dust in the intake boot. Not too pleased about that. It was recently cleaned and oiled.

I don't think it will make much of a difference in the short term/occassional riding in the dusty areas. But if riding in dusty areas on a regular basis one might consider another filter set up.

I think i'll be be giving UNI a try for longevity/reliability reasons. I'm not too concerened about squeezing every last hp/airflow our of the motor. JMO

Joe

:eek: You know I heard that before from other riders. That would probably be a hot setup for a TT racer, but not trail or xc racing. I have always used uni's in the past with success.:)

RIDER11X

06-15-2003, 04:39 PM

bump:eek:

hondafox440

06-15-2003, 04:53 PM

My machine has been run with a K&N since it was brand new, and the top end was in perfect shape when we installed the 440 kit.. I love the snap it gives down low.

RIDER11X

06-15-2003, 05:00 PM

Originally posted by hondafox440
My machine has been run with a K&N since it was brand new, and the top end was in perfect shape when we installed the 440 kit.. I love the snap it gives down low.

What kind of riding do you do, out of curiosity?

skemp

06-15-2003, 05:59 PM

I prefer foam filters because they flow just as well and don't let nearly as much fine particles pass through as a gauze filter does.

JD400exrider

06-15-2003, 06:33 PM

Uni Filter, EHS lid mod, Snorkler removed

All good on this end. I think that the EHS lid may not let as much air in as no lid at all though. :p Seems to work OK

RIDER11X

06-15-2003, 06:36 PM

Originally posted by HN400exracer
modded snorkle and a k&n with outwear
What snorkle mods can be done?:huh

06-15-2003, 06:41 PM

removing it like me :D

EvilJester400EX

06-15-2003, 06:44 PM

UNI no lid.

QuadTrix6

06-15-2003, 11:20 PM

UNI with the lid

RiPPiNiTuP7

06-16-2003, 02:57 AM

Uni, no lid.

RIDER11X

06-16-2003, 04:20 AM

Originally posted by QuadTrix6
UNI with the lid

Do you an aftermarket pipe with that?:confused2

sweet300ex

06-16-2003, 04:26 AM

UNI with no lid

skemp

06-16-2003, 05:47 AM

You can remove the snorkle, or duct it up to a place that will recieve direct airflow from outside, such as under the hood, or better yet under a hood scoop.

I run foam with a modified lid in dusty conditions, and take the lid off when it is moist out or during the winter. The stock snorkel is intact, but I am trying to find the correct shape and size hose to route is to some more direct airflow.

carbonfiber440

06-16-2003, 05:55 AM

I run a K&N with outerwears, with 6 1 inch holes. mainly ride the open desert and oiling your outerwear with foam filter oil helps keep out the fine dust before its has a chance to get to the K&N. This usually works for me and keeps out the fine dust.

OutlawEX

06-16-2003, 05:57 AM

I use UNI:devil:

flaneledholes

06-16-2003, 10:11 AM

K&N with outerwears, no airbox lid and no snorkle..... I have had both, uni and K&N... well, I rant he uni with a lid on, and it outperformed it, but not by much....:( I would say the K&N with the outerwears wrap (the water resistant one) is about the same as a uni if not better...

QuadTrix6

06-16-2003, 01:04 PM

Originally posted by RIDER11X
Do you an aftermarket pipe with that?:confused2

Im gettin a pipe soon. I need the lid and foam because it gets real dusty or really wet were i ride and the filter is a mess after one ride after being cleaned and lubed. Just curious as to why you ask?

excess

06-16-2003, 01:17 PM

I run a K&N filter with no lid, no snorkel, and a yellow ( yellow's very important ) outerwear.

zoom400ex

06-16-2003, 01:53 PM

uni , no snorkle, and 6 1-inch holes in my lid.

northeast400

06-16-2003, 02:25 PM

I have run no lid, an EHS lid, outwares lid, and stock lid, all rejetted to spec each time, the funny part is it made the same power each time, I did this with a twin air or UNI filter, It was louder with the lid off so it seemed faster, but it wasn't. :confused2

RIDER11X

06-16-2003, 02:43 PM

Originally posted by QuadTrix6
Im gettin a pipe soon. I need the lid and foam because it gets real dusty or really wet were i ride and the filter is a mess after one ride after being cleaned and lubed. Just curious as to why you ask?

Just wondering how you get enough air to feed an aftermarket silencer.:eek: ;)

lars

06-16-2003, 02:55 PM

i use uni also good filter:cool:

fuddrucker

06-17-2003, 02:18 AM

Originally posted by sweet300ex
UNI with no lid

What he said. :devil:

brim400ex

06-17-2003, 02:24 AM

i find that uni and k&n filters let fine dust through, twin air filter's are the best i've found.

lex luger

06-17-2003, 04:24 AM

...anything foam...clamped on to as little as possible(often the carb itself)

RIDER11X

06-17-2003, 04:39 AM

Does Twin air or Uni really flow better than stock? Does it change the jetting at all?:confused2

06-17-2003, 06:54 AM

yes...and yes...if u get more air then u will be running too much air with not enough fuel so you will need to rejet it...i run a sparks foam filter with aluminum ring and outerwear under my custom cut lid:macho

ryanh250ex

06-18-2003, 01:12 PM

i run the stock lid (no holes) and the stock filter. as soon as i get my jetting right i might play around with going lidless for a while (tried it with current jetting and backfired like a mofo), or cutting some holes through the lid. i'm thinking about just going without the lid, and putting the lid back on when i ride at NJORVP since it's often very dusty there. i might be buying a new air fitler too....

i have heard that when it comes to foamers, Twin Air is the best because it offers increased airflow and plenty of filtration. The UNI filter is also great, but it is a dual stage filter, and offers unnecessary layers of filtration, and uses up more oil and cleaner. so i'll go with a Twin Air when it comes time to buy a aftermarket element.

tants

06-18-2003, 03:07 PM

i run twinair filter, with no lid, with snorkle blocked off (removed) and it seems to work well... im gonna get a new filter soon, i dont know to get k&n or uni :confused2

RIDER11X

06-20-2003, 06:11 AM

OK, if someone can get proper jetting with a stock element that does a good job of keeping the dust out of the motor, and the jetting goes very lean by removing the airbox lid, then more than enough air is being drawn through the stock element meaning the motor has not exceeded the amout of air that can be drawn through it's stock intake tract, right?
So if that is the case, where is the atvantage in aftermarket filters?:confused2 Just curious.:)

cals400ex

06-20-2003, 08:52 AM

i have a twin air and uni. the uni is a much bigger filter. the uni is two stage and the twin air uses dual layers. the twin air is a smaller filter than stock. if i had to do it over again, i would just be buying the uni.

Bill Fuller

06-20-2003, 11:47 AM

Uni,as stated before K&N lets in to much dirt.

DaveEX7

06-20-2003, 12:57 PM

I run K&N w/ Outerwear and sometimes Il run without the airbox lid if its not wet out cause I dont want my filter and airbox gettin wet... but when I remove the airbox lid the pipe sounds kinda funny.:huh ..... it doesnt have that loud nice sound it usta, now it has a low kinda utility sound without the lid, so I run the lid most of the time anymore.

RIDER11X

06-20-2003, 04:40 PM

Originally posted by DaveEX7
I run K&N w/ Outerwear and sometimes Il run without the airbox lid if its not wet out cause I dont want my filter and airbox gettin wet... but when I remove the airbox lid the pipe sounds kinda funny.:huh ..... it doesnt have that loud nice sound it usta, now it has a low kinda utility sound without the lid, so I run the lid most of the time anymore.

Do you change your jetting for that?:confused:

DaveEX7

06-21-2003, 04:48 AM

Originally posted by RIDER11X
Do you change your jetting for that?:confused:

Nope I leave my jetting the way it is..... sometimes Il take the lid off so the quad can get more air and so it doesnt choke if ya know what I mean.

RIDER11X

06-21-2003, 06:45 AM

Originally posted by DaveEX7
Nope I leave my jetting the way it is..... sometimes Il take the lid off so the quad can get more air and so it doesnt choke if ya know what I mean.
I was just wondering if you are jetted to run with the lid on, and are going lean with the lid off?

DaveEX7

06-21-2003, 07:59 AM

Originally posted by RIDER11X
I was just wondering if you are jetted to run with the lid on, and are going lean with the lid off?

Oh ya I was jetted to run WITH the lid on... but Im gonna leave the jets the way they are unless the temp. changes.

QuadTrix6

06-23-2003, 02:11 AM

Originally posted by RIDER11X
Just wondering how you get enough air to feed an aftermarket silencer.:eek: ;)

You think it will hinder the performance? Im actually thinking of getting an EHS lid and the UNI for more flow but still some filtration. What is the benefit of removing the snorkel?

tants

06-23-2003, 02:46 AM

Originally posted by QuadTrix6
You think it will hinder the performance? Im actually thinking of getting an EHS lid and the UNI for more flow but still some filtration. What is the benefit of removing the snorkel?

the snorkle is a joke... it takes up room and makes things a pain...
id remove it if you plan on running no lid... but if you have a lid keep it on...

QuadTrix6

06-23-2003, 07:29 AM

Originally posted by tants
the snorkle is a joke... it takes up room and makes things a pain...
id remove it if you plan on running no lid... but if you have a lid keep it on...

what if i just have holes in the lid or the EHS lid?

RIDER11X

06-23-2003, 07:42 AM

Originally posted by QuadTrix6
what if i just have holes in the lid or the EHS lid?

Alot of riders run the lid w/ 6 1" Uni air vents in the lid and get plenty of airflow, even w/ a stock filter, i am told. :cool: