I use either stock or uni foam, given my riding conditions in the summer are generally dusty I like the longevity and ability to clean the uni many many times, however they say that it restricts flow just a bit. K&n is junk in my book they just allow too much blow by. The stock filter allows some blow by but I don't feel like its as bad as k&n so I run a stock filter in the winter because we have minimal dust. Nvr had any experience with twin
If I'm just doing drag races stock filter is in
Summer uni is in

 

So would you say the UNI filters as much or more dust than the OEM?

My primary concern is dust protection with airflow as a close second.

 

UNI I would say keeps at least twice as much dust out as it is an oiled filter and I believe u can also get an outerware for them. If I were u I would go uni

 

We've ran both for years (UNI and Twin Air) in our banshee and YFZ 450. We've ridden in the California desert, Oregon Dunes and lot's of dusty trails. As long as you maintain them with a decent filter oil you'll be fine. For oil, we use the No Toil system (oil and cleaner).


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Sounds good. I have a brand new UNI on the shelf I just want to make certain that is the best route. I have some UNI spray oil already so I'm covered there.

What is the best way to clean it? Is it as easy as washing it in the kitchen sink with dish soap or should I get the filter specific cleaner?

 

I always just buy the uni brand oil and cleaner but they have other brands that do the exact same thing. I always spray mine with cleaner stand it up for 5-10min then take the water hose and spray it off then allows it to dry, oil it and your ready. It's pretty cool cause it can look like **** and after u clean, it looks brand new every time. Also some people spray the oil on very thick and that is not necessary all it will do is drip down in the air box I just spray a thin coat on

 

I believe V-force john had posted somewhere here that you get the most performance out of the stock filter. I personaly like the paper filters, they seem to work real well and with the foam outer filter on the stocker I got 2500 miles out f mine and it still wasnt too bad. I ride in most coal dust area.
Uni is a very good filter and also will work well.
Here's a vid of the kind of dust I ride in at times, (this was taken when i did a wolfsnout review). You can skip to the 3 minute mark for the dust.

 

I believe V-force john had posted somewhere here that you get the most performance out of the stock filter. I personaly like the paper filters, they seem to work real well and with the foam outer filter on the stocker I got 2500 miles out f mine and it still wasnt too bad. I ride in most coal dust area.
Uni is a very good filter and also will work well.
Here's a vid of the kind of dust I ride in at times, (this was taken when i did a wolfsnout review). You can skip to the 3 minute mark for the dust.

Wolf Snout Review - YouTube

Haul ass and get up front less dust there lol

 

There are some great vids on youtube right from UNI showing how to properly clean and oil their filters.

 

Where is a good place to buy the UNI?

 

I ran the whole nine yards on filters..We have MOON dust here that penetrated everything..I settled on the Uni filter with an outwears pre filter..

 

I got one off ebay for under $40 shipped to my door in Canada from the USA.

 

Thanks, will check ebay.

 

Stock supposedly is best performance. Stay away from K&N it lets too much past. People usually switch to twin or uni due to the fact that they are reusable where as stock filter is paper and would need to get replaced. The stock one does have a prefilter that can be cleaned and kept however. Choice is Uni or Twin air IMO.

 

What about using an Outerwear on a K&N? Used K&N's for years on all my sand bikes sand cars and my previous 4x4 quads w/o any issues. They all had Outerwears though.

 

What about using an Outerwear on a K&N? Used K&N's for years on all my sand bikes sand cars and my previous 4x4 quads w/o any issues. They all had Outerwears though.

I have a 2000 arctic cat 500 auto 4wd with 3000 miles with a k&n air filter with outerwears cover over it and works just fine. I would use the outerwears cover over the k&n air filter though works just fine.

If you find a good deal on a K&N with outerwears cover cheaper than uni with foam overlay, go for it.

Personally, all air filters are just fine it is the ones who don't change or clean them as needed that has the issues. For me, since I don't do a lot of dusty trail riding maybe 300 miles to at most 400 miles per year, I only clean my K&N air filter once per year (season) and although dirt comes out washing it clean over cold water, it is not terribly dirty.

Personally, I think uni filters are cheaper than K&N though and would go that route or stock OEM.

 

Hi, HumpinJack,
I saw your post on Yamaha radian starting problem. My 86 Radian YX6oo has same problem, fully charged battery, votage 13.6V, all accessories work, on pressing start button, hear click one time from vicinity of battery, and all electric power gone, no fuse blown, battery reads 12.7Volts. power restores like 1/2 hour later. Did you find what was happening with your bike. appreciate any tips, Thanks.
Starter motor will not operate.

 

I realize this is an old thread, but I'll chime in. I bought a Uni filter for when the stock paper filter expires. But before I was able to even use the Uni, I decided to switch to Twin Air. I think the filtering quality between the Uni and Twin Air is the same, but what I don't like about the Uni is that you can not separate the metal cage from the foam filter for cleaning. So for ease of cleaning, I went with Twin Air.

 

i use stock for the performance (i made a post above) but they get spendy if they get too dirty or wet (winter time)

I do have a Uni i can throw in as back up, i don't like how the filter doesn't face where the air is flowing though.

I like to be able to clean it and be good to go though.

 

I tried the Uni Filter and it went right in the garbage after the first time I tried to clean it. The non removable screen is a poor design and no way allows you to thoroughly clean the filter as good as the Twin Air which you can easily remove the cage for proper cleaning and proper oiling.

Nothing filters air better than a high quality, properly oiled, foam filter. Paper filters do generally make more HP because they flow more and filter less. (cough,, K&N)

Run Twin Air its a no brainer. As far as the HP loss vs stock there are as many claiming its false than ones who claim its true. With the way these motors are mapped so lean a little less air flow would richen that up at a tiny loss of a couple HP and will only benefit the life of these motors long term.