Good or bad for K&N filter on a 2010 RZR 50?
K&N filter thoughts
wkayl
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2,841 Posts
Most RZRs are at a steady WOT aren't they.:rofl3::rofl3: anyhow surely some super smart engineer could come up with something which could vastly improve on what we have now don't you think.:question:
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142 Posts
I agree with Hoser.
I have the grumpy mod.
Yeah there must be some restriction with an extra filter inline, but every time you ride and get dust on the stock filter you increase the resistance to air flow because it is getting clogged. Six of one a half dozen of the other.Change the prefilter frequently and the entire airbox stays clean.
The prefilters cost about $6 at wallyworld and can be swapped out in a couple of minutes.
Cheap insurance in my opinion.
I have the grumpy mod.
Yeah there must be some restriction with an extra filter inline, but every time you ride and get dust on the stock filter you increase the resistance to air flow because it is getting clogged. Six of one a half dozen of the other.Change the prefilter frequently and the entire airbox stays clean.
The prefilters cost about $6 at wallyworld and can be swapped out in a couple of minutes.
Cheap insurance in my opinion.
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1,184 Posts
Just pulled one out of my "10" I just bought. Stickiest greasy mess I have encountered. Dirt was in the throttle body. OEM pleated paper is on it now. Along with the grumpy mod.
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147 Posts
down here in Ms the dealer said to use the UNI,they had the best luck with it..
UNI filter performance all depends on the filter oil used and how well its applied regardless of the filter oil used the filter must look the same color inside and out if it looks blotchy or tie-dye in appearance then the oil is not distributed through the filter properly.
I have found the UNI filer oil to be the worse to use the best I have found is Maxmia FFT and or Maxima FAB 1 (same stuff one is in a spray can)
Foam filters are a messy process from start to finish but offer great protection I been liking the stock paper filter with the grumpy mod, keeping 90% + of the dirt out of the air box works wonders from the factory after a 30 mile desert ride I would remove the cover off the air box and dirt would pour out as it was remove.
Their is NO deflector in the air box to prevent the dirt/dust that enters the air box from going right on the filter itself like EVERY OTHER ATV HAS (wake up Polaris!) so the dirt that gets on the filter then your bouncing down the trail trying to shake the dirt through the filter media :sad:
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22 Posts
hey all, gonna add my 2cents. I think KN filters improve the airflow to the engine where the engine is being starved by a puny oem filter. i looked closely at our oem filter and wow, super huge for a mere 800 cc engine. i don't think our engine is starving enough for air to warrant the expence. also, there is nothing wrong with the quality of the oem filter we use, so don't fret over dust getting past. it has been chosen by engineers and i'm sure it is more than adequate. a k&n in our case might bag you 1 hp, but i am willing to bet that is it. want bang for your buck? put an extreme belt with tighter tolerances and notice your engine run a little higher in the rpm range because of the slight gearing advantage in the clutches. the next best investment to get the most out of your horsepower is a clutch kit. our clutch springs make the engine a little anemic until the revs build up. after that, if you wanna spend the bucks, go all out with a dual exhaust, intake kit and don't do that unless you are planning to add a good fuel controller. could talk about this all day.
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1,331 Posts
Humm well, let's see, Again I went from stoak, to UNI, to KN both with an deleted air box. Both let some fine dirt past the filter, ( I maintenanced often ) then I went to the UTV Inc. Sealed system, only rode on it twice very dusty, and spotless clean past filter!
Main thing is the aftermarket systems mount to motor trans tranny, so it can't flex from chasis to motor, which is were allot of the issue comes from!
But to each their own, as it has been said, debated a hundred times. When ita time to rebuild your engine, upgrade the dang intake system!
Yes we could argue it's the engineered system from stock, well, just ask anyone, regardless of year model who's had their engine rebuilt due to the stock engineered system are living proof that something's wrong.
Yes there are some that don't have issues! But if I were one of those, I'd keep an close eye on it!!!
Good day!
Main thing is the aftermarket systems mount to motor trans tranny, so it can't flex from chasis to motor, which is were allot of the issue comes from!
But to each their own, as it has been said, debated a hundred times. When ita time to rebuild your engine, upgrade the dang intake system!
Yes we could argue it's the engineered system from stock, well, just ask anyone, regardless of year model who's had their engine rebuilt due to the stock engineered system are living proof that something's wrong.
Yes there are some that don't have issues! But if I were one of those, I'd keep an close eye on it!!!
Good day!
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22 Posts
[QUOTE
Yes there are some that don't have issues! But if I were one of those, I'd keep an close eye on it!!!
Good day![/QUOTE]
Good advice, will do that, thanks.
Yes there are some that don't have issues! But if I were one of those, I'd keep an close eye on it!!!
Good day![/QUOTE]
Good advice, will do that, thanks.
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147 Posts
I am still running the paper filter with the Grumpy filter mod on my RZR-S but I could probably get some pictures of my other ATV filters that are uni/FAB-1 if that would help.
Why you think you over oiled?
When I oil the filter with the spray I spray on a bunch inside and out, as the solvent evaporates the filter gets really cold so I let it set 5 min to allow it to warm then I massage it in until its uniform in color if you squeeze the filter and can squeeze out some filter oil you over oiled.
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7,344 Posts
Check the Vent Racing air canister system. It uses a Donaldson inner filter and a Donaldson outer filter. Has a fluff valve for self cleaning. They are selling for about $160 and are a huge improvement over the Polaris filter and even my DFR canister.
Give 'em a look!
Pirage
Give 'em a look!
Pirage
Buy what works for you.
Obviously someone likes them,(not Me,but someone)they are still in business and going strong.
I use a stock filter with Outerwears cover.
I pull the filter,check it and clean the air box after every ride.
Works for me with no issues.
Doug
Obviously someone likes them,(not Me,but someone)they are still in business and going strong.
I use a stock filter with Outerwears cover.
I pull the filter,check it and clean the air box after every ride.
Works for me with no issues.
Doug
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24 Posts
I just did the grumpy mod last night and went riding all day today following jeeps( very dusty)... My rzr and I were covered in dust. Airbox has a fine dust behind k&n. After stock paper filter is spotless! Do the grumpy mod, use a k&n for the pre filter, paper for the factory and you will be happy!
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1,184 Posts
I use a paper filter in my mod. I made the hole so it would fit snug. I can just pull it out and give it a couple of taps and it cleans out. Cant do that with a K&N "filter". Best part is they are only $6-$8. I even wash mine out with warm soap and water every once in a while and get extra life out of it. Cant hurt the integrity of it because its just a pre-filter anyway.
On edit: Your dust in the box could be because your engine is "stealing" air once in awhile from the exhaust tube coming from the clutch. Can happen under certain conditions.
Air takes the lease opposition to flow your telling us that the engine is going to suck the air through a hole 5x smaller ans several inches in length than the air filter that is only 1/2" thick, nice theory but I dont buy it been doing air flow for a living for more than 30 years things like that just dont happen.
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1,184 Posts
I didn't just make this up. I did the experiment not a theory and it didn't take me 30 years to figure it out. Go and plug your out side source of air and start the motor. It will run. It is pulling air from the clutch air tubing. Now plug the clutch air tube. Motor will quit and wont restart. K&N in the grumpy mod starts getting plugged with dirt. Stomp on the gas, motor calls for lots of air. K&N cant supply all it so the least resistance is the clutch tube which exits the rear above the motor, the dustiest area of the machine. Oh, yes the K&N can plug to where the motor is starving for air. There is a post just today from an unhappy customer.
LINK TO POST
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199 Posts
wish I had a UTV filter kit on my 08 RZR, put a K&N on it 1300 miles on RZR and it burns oil...bad go for 30-40 miles and have to add 3/4 quart of oil. Stinks, you would think that K&N would have made a better seal than what they did. Now have to rebuild engine that is barely broke in. Yes I cleaned and oiled the filter but still got dirt in motor so I know its like closing the door after the horse gets out, but now I do have a UTV filter kit and so far NO DIRT in the intake tract...DOH!!! So yes K&N on the stock airbox is crap. I have K&N on ATV and Dirtbikes with no dirt issue, but RZR airbox...:rm_thumbdown:
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443 Posts
I don't understand. I can plug up my snorkle air intake with plastic so there is no air infiltration and the motor will die out immediately on my 2011 50". If it will suck enough from somewhere else, why is this?
GJRonK
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