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4 wheelers and K&N filters

Unit453

Unit453

Cruises comfortably at 140...
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I did a little reading and came up on this forum with lots of good information regarding K&N filters.

I'm interested in the consensus on these filters for off road applications. I know what people say about that particular brand on our trucks and how they're pretty much the worst filter out there.

This particular post struck my interest:

K&N filters are the worst thing ever to see the intake tract of an offroad vehicle. Foam is superior in every way except some CFM of air flow. What is your priority here. To protect your investment or gain a fraction of a horsepower. Outer wears.....lets see, that would be a filter for your filter. No thanks. K&N filters have a place. On street machines that see little dust and in a garbage can before they contribute to cylinder scoring.


brianbusboy is also correct. If you run foam you can go quite a while before you need to clean them. Dust is the killer....not mud. Even a K&N will stop mud.


I would rather clean my bathroom then go through the 24 hour ritual of properly cleaning and oiling a K&N. I can keep two foamys ready to rock in zip locks.

The above comments reflect the writers opinion only and are only loosely based in fact. K&N does give you a sticker to put on your ATV.

On a modern fuel injected quad, Ive read that with more air flow you'll need some kind of programmer to compensate for the ECM running lean. I guess programmers for the EFI quads really wake them up with the addition of intakes and exhaust systems to allow proper fueling.

Anyone have any insight on this?
 
I know on my Crotch rockets I have run the K&N because there are very few options....With the Better flowing filter and the higher flowing exhaust the bikes actually ran like crap until I got a Power Commander....Once I had that they were running beautifully and had a lot more power....I ended up running a BMC air filter in the ZX-14 before I wrecked it and it was worlds better than the K&N....Thats my .02 and I hope it helps



Also since I live in a dusty climate and I play in the dunes with the trucks, I am runiong pre-filters on the trucks...they are working great at prolonging cleanings
 
I have had K&N filters on my last 2 atv's and plan on getting it for my next! With the prefilter sock the filter really doesnt get to dusty.

I dont see what the big deal is :rolleyes5:
 
I agree with the post about K&N, I like the Twin Air setup much better for bikes and ATVs. I am also in the same spot as you Dunes with the filters for the air kit on my bike.

Check out the Twin Air here
 
When I used to race quads I started with K+N. After my first year I tore the motor down to find it was trashed, mainly from dust. After that I switched to twin air and never looked back. I had great luck with them. I ran a full season on a full race 250r motor with no issues. I was pretty impressed. I would never ever run a K+N again on anything. I guess they would be okay for the street, but this just another opinion. Hope it helps.
 
I run K&N on my yfz 450 and 400ex. I check them after every ride and clean them probably every other. I know they suck for extended cleanings. I have the sock on my yfz and it helps keep the filter a lot cleaner vs my wifes ex without the sock. Performance gains are slight at best; just keeps me from buying new ones. I think they are good if you clean them frequently and run the sock, and I do mean frequent cleaning. I always service all my vehicles early, so it's not that big a deal and I like doing it. Twin Air filters are a better choice imo.
 
I never heard of twin air.....when I was looking for a filter for the zx-14 there were only two available...piper cross and BMC...the BMC is a european brand so I figured They'd be better than the pipercross all foam filter
 
I don't ride anything street ( well my off road stuff goes on the street ) but anyways, I have 5 quads and my dirtbike and that's what I run the Twin Air and K&Ns on. They may not be available for street bikes. I am slowly replacing my K&Ns with Twin Airs.
 
t2ch said:
Wrecker, you got these for atv's?

I'd also like to talk to you about a filter for my truck.
Click to expand...

Yes Twin Air for ATVs, as well as Amsoil Nanofiber air filters for most on road cycles. PM me what your applications are and I can fix you right up.

Trucks are easy, nanofiber drop in and CA intakes available.
 
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Ive never heard of Twin Air personally but if you recommend them than thats what I'll go with. I'm already running Amsoil in my Honda now. Its for an 08 Honda Rincon 680. No hurry.
 
I never heard of them either....what makes them so much better than the BMC? I would be interested in knowing and then possibly buying for my ZX-14
 
The Twin Air filters are great for off road dust and dirt, they don't have applications for street. The Amsoil Nanofibers are the ticket for on road stuff.

Here's a description of those:

Nanofiber Basics
Because the nanofibers in AMSOIL Ea Motorcycle Air Filter media are so small, there are more pores per square inch, allowing for higher dirt-holding capacity and lower pressure drop compared to traditional filter medias. Thinner media fibers produce more uniform pore size distribution, improving the filter’s overall ability to capture and retain particles.

Air Filtration Basics
An engine requires air for combustion, but the air drawn in through the induction system is loaded with contaminants. There are over 400 tons of suspended dirt and other contaminants in a cubic mile of air over a typical city. The concentration can be even higher in rural areas where there is frequent travel on unpaved roads. The dirt and contaminants drawn into an engine from the air are the leading causes of engine wear.

The function of the air filter is to trap and hold these wear causing contaminants without restricting air flow. As the filter traps more and more contaminants, air flow becomes restricted, smothering the engine and diminishing performance. The more wear causing contaminants a filtration media traps and holds, while still allowing optimum air flow, the better the filtration media.

The nanofiber technology used in AMSOIL Ea Filters surpasses all other technology in efficiency, capacity and service life. With AMSOIL Ea Air Filters, dust and submicron particles remain on the surface and are trapped in the nanofibers, preventing particles from lodging in the filter media depth. This produces higher efficiency and higher capacity, extending engine and filter life and reducing engine wear.

Ea Motorcycle Air Filters
The filtration media in the Ea Motorcycle Air Filter is pleated and has epoxy-coated wire on the face and back of the media for additional strength and stiffness. High quality plastisol potting compounds bond the pleat packs to the plastic or aluminum side plates. The S&S (aftermarket engine and carburetor manufacturer) style round filters are manufactured with high-quality plastisol that bonds the media to the wire backing and sealing area.

Superior Filtration
The synthetic nanofiber media featured in AMSOIL Ea Motorcycle Air Filters have sub-micron diameters and small inter-fiber spaces, resulting in more contaminants being captured on the surface of the media and lower restriction. Cellulose, wetted gauze and foam filters have larger spaces between the media that cause contaminants to load in the depth of the filter, resulting in airflow path plugging, higher restriction and lower capacity.

Cleanable for Long Service Life
AMSOIL Ea Motorcycle Air Filters are cleanable, providing unsurpassed protection and long service life. AMSOIL Ea Motorcycle Air Filters should be cleaned every year or according to operating conditions. Operation in extremely dusty or dirty environments may require more frequent cleaning. Ea Motorcycle Air Filters should be changed every four years.
 
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