K&N Filter...who's tried it

R-acer
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R-acer
Edited Date/Time 1/23/2012 2:42am
Not sure about the idea of running a filter this free flowing....... anyone tried one?

http://cgi.ebay.com/ebaymotors/06-09-Kawasaki-KX250F-Xstream-K-N-Air-Fi…
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SteveS
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SteveS 6/9/2009 4:51am
6/9/2009 4:51am
Didn't someone ask this question last winter and set off a firestorm between the "it'll kill your motor because it passes dust" and the "it makes more torques and horsepowers" camp?
R-acer
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R-acer 6/9/2009 5:07am
6/9/2009 5:07am
SteveS wrote:
Didn't someone ask this question last winter and set off a firestorm between the "it'll kill your motor because it passes dust" and the "it makes...
Didn't someone ask this question last winter and set off a firestorm between the "it'll kill your motor because it passes dust" and the "it makes more torques and horsepowers" camp?
Not sure...if there was I missed it.
I did see a pic of a Kawi with one installed.....It could have been one of the pro circuit bike's, but I couldnt see the number plate in the pic.

rallendude
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rallendude 6/9/2009 6:37am
6/9/2009 6:37am
I know a guy who uses one. He doesn't ride much though. I do bike work for him from time to time. I don't like it. It's not any easier to use than the foam ones. It's heavier and I have no idea if it's clean or not.
indy_maico
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indy_maico 6/9/2009 11:12am
6/9/2009 11:12am
They are no good in the mud. Good for your streetbike, but I wouldn't run one on a dirt bike.

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Matt Fisher 6/9/2009 3:33pm
6/9/2009 3:33pm Edited Date/Time 4/17/2016 12:19am
Cotton gauze (K&N) filters are documented for having both very high flow and rather poor filtering capabilities when it comes to very fine media (dirt particles).

One of the Diesel websites did a scientific test a few years back, using everything from oil analysis to secondary filtration systems, that's what they came up with. Vehicles using the K&N style filters would consistently have higher levels of silica (sand particles) than vehicles using paper type filters. I don't believe they tested oiled foam filters though.
Tiki
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Tiki 6/9/2009 3:52pm
6/9/2009 3:52pm
One of the guys I ride with has had his on since 05, no issues. Couldn't tell you about power. His slow is faster then my fast.
minidad160 6/10/2009 2:01am
6/10/2009 2:01am Edited Date/Time 4/17/2016 12:20am
We bought a used bike that came with one on it, let alot of dirt go through so much you could see bunch of dirt in the intake boot, switched back to foam no more dirt. Didnt really notice any power difference. The k&n didnt really seem to seat right.
Cygnus
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Cygnus 6/10/2009 8:36am
6/10/2009 8:36am
Don't do it !
racer369
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racer369 6/10/2009 12:44pm
6/10/2009 12:44pm
Just rebuilt a 2009 that had one. Needed new piston and rings PLUS new cyclinder. Air boot to carb was full of dirt. THEY SUCK!!!!!!!!!!!!!!!!!!!
CYCLE WERKZ
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CYCLE WERKZ 6/10/2009 7:15pm
6/10/2009 7:15pm
i don't really care for them in the dirt .I have alot of atv riders that run them with no problem .One of them that races had 92 hours on his before we did a complete rebuild and the motor still looked good inside.The cylinder looked good with little wear to be seen after i ran a hone through it a few times but i will stick with my foam filters
Yves Edge
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Yves Edge 6/10/2009 11:42pm
6/10/2009 11:42pm
no power gains on my dyno and they do let dust by.
CR500Rider
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CR500Rider 6/16/2009 3:13pm
6/16/2009 3:13pm Edited Date/Time 4/17/2016 12:27am
When I pulled the K&N out of my buddies CRF450 it sailed really good into the garbage can.

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