wow i just removed my UNI for the stock airbox and i found some sand in my intake. before you ask i did oil the inner and work it in twice before i put the outer wrap on and the outerware over that. this was one hard weekend in the glamis dunes riding behind some sand cars and two wheelers. so yes i was in the roost a couple of times. but that no excuse for this poor filtration.

i have run my stock filter and outerware for wo trips to the dunes and never had a spec of dirt in the intake. looks like i am going back to stock untill UMP sells their airbox. here are some pics of my horror.

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Mega,
I had a UNI in and when i put my Air Fuel meter in, I noticed that at wide open throttle I was running rich, even with fuel controller leaned out all the way. I switched back to stock filter and had to add one click richer at wide open throttle. So stock flows alot better. Now seeing your filter makes me even more happy I switched back.
Are you going to inspect cylinders?
Keep us posted fuel tanks.
Jason

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HPD:pistons, push rods, head, valves,bush. kit, T.B.. D.F.:pipe, fuel con., belt, harness. super tip clutch. MPI: ECU. Wide band o/2. UTV CRAP: water temp, gusset tubes. T.C.B.: Cage w/ doors & roof. Edge camera: Ralley Cam. Holtz: skid plate, chassis plate,Vents. Mafia Ind.: +6'' L.T. w/ rad flow & Noleen shocks. Gear One Rack. SRT Beadlocks w/ Good Year. Amsoil: intake filter, oil filter. Optima Y., FST hubs, HIDs.

I had the same issue with the UNI. (I was in dust though, no sand) Back to stock for me.

what part number uni do you have yours looks nothing like mine ive been to the sand a few times and mine was clean...hmmmmm wonder if uni made a desine change????

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2006 silverado 2500 hd
2006 additude toy hauler
2008 polaris rzr
2006 suzuki ltr450
2005 kawisaki kfx700
2003 suzuki z400
2003 honda ex250

i have two filters and both are UNI part number NU-8503ST with outerware prefilter number 20-1211-01 VVRQ135-7.

The RZR filter is the same as the 800 sportsman fitler. As an alternative to the UMP ( nice product, way expensive) I used a fleetguard filter housing p.n ah19091. You will have to be long traveled, but it uses a outer and inner safety filter. the housing has a 3" inlet and outlet. the housing is approx.15" long and 8" around. Then a piece of flexable cold air ducting into the bed. On the race RZR we mounted the entire cannister in the bed to get it out of the rolling dustball that is desert racing and it works really well. Be sure to support the intake track with some bracketry to keep the throttle body from ripping out of its boot.(Polaris weakpoint) Hopefully the UNI didn't let enough by to hurt the engine. I am surprised though, thats usually a great filter.

can you post a pic of the race filter?

yeah i could not believe the UNI let dust by. i ran uni's on my banshee carbs for 4 years and no issues. go figure.

That sucks. I think I will just cut a hole in my bed and run it up through the bed with a k&n with an outerwear like Mafia Ind. Does their race RZR's.

the apollo works really well and flows like crazy.. i have the apollo then a variant of the grumpy mod with another k&n filter in the inlet. so my clutch is filtered and the engine is double filtered..

I would also like to see a pic of the intake described above by odtodd1az ... Uni is normally a good product sounds like they dropped the ball on the RZR filter though thanks for the heads up on the problem megadesertdiesel

ill go look at mine and see if it's the same number....

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2006 silverado 2500 hd
2006 additude toy hauler
2008 polaris rzr
2006 suzuki ltr450
2005 kawisaki kfx700
2003 suzuki z400
2003 honda ex250

The family RZR has a K&N with an outerwear on it in the stock air intake box(the one in the bed between the seats) and it runs fine after 4 trips and at least 200 miles in the dunes.
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We also run open K&Ns on all our Banshees and have had no problems sucking in sand, and we have been running that way for 10 years!

Don't want to start a K&N UNI war, but K&Ns and outerwears have worked very well for us.

RE: No more dirt in my engine thanks to the new CYCLONE RZR Filter from BTI Performance Products - BTI Performance Products
availble from Yamaha Rhino Accessories, Yamaha Rhino Performance, Arctic Cat Prowler, Polaris Ranger, Custom Yamaha Rhino @ DragonFireRacing.com

My name is J. Rhodes and I just recently purchased an Air filter for my Polaris RZR directly from you. Installation was simple and straight forward.

Took it out for a trial run this weekend and was amazed with the results. We rode in so much dust you could literally not breathe without a mask or some type of filtration device on your face. (no joke) We logged 69.5 miles this weekend and could barely tell one bike from another with all the dust at the end of the day. I figured I was due for a rebuild after that trip and expected to be scooping dust out of the airbox.

Well........upon inspection there wasnt a single grain of sand in the air boot! Granted there was a ton of dust on the filter and in the canister but with a little compressed air and a wet cloth I was back in business.

Just wanted to thank you guys for building a superior product and backing up your claims. Thats rare in business today and even with price point set where it is, it is still well worth the investment.


Keep up the good work!

Thank you,

J. Rhodes
Date Review Added: 03/04/2008 by J. Rhodes

megadesertdiesel, I will try and get a picture up of our set up, everything I have is too big and I don't have a program for chopping, nor am I savy enough to know how. you can however go to fleetgaurd on the web and look up the housing by part number. ah19091

i had the same problem with my RZR because i was using UNI air filter. after riding for an hour in the dunes i notised that my RZR was not giving the power i used too and the enging started making noise and when i checked the oil, the engin was almost empty, eaven thought it was my 1st ride after changing oil. after adding 1 lit of oil, i started the engin the noise went awy but after getting home and taking the filtr off there was so much sand and some went in side the engin.