BMC Air filter??? Race or Street - Kawasaki ZX-10R.net
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post #1 of 14 Old 12-08-2008, 11:18 AM Thread Starter
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Question BMC Air filter??? Race or Street

Have read this is a great mod/upgrade from the stock but cannot find info on race vs/ street filter. Anything else I need to keep in mind if I order this??

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post #2 of 14 Old 12-08-2008, 11:35 AM
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The only true upgrade to it, I've been told, is that you don't have to replace it. It can be cleaned and reused almost forever. Actually, I've even heard it said many times that the stock air filter has better air flow than BMC or K&N, and that there is no real horsepower to be gained by going aftermarket. There was ONE aftermarket filter that was said to give you a few additional ponies, but I can't remember the name, and you had to order it from over seas. I believe the filter was made by a company called "DNA", but I'm not certain of that.

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post #3 of 14 Old 12-08-2008, 11:41 AM
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There has been a great deal of debate about this. Many have said that they were unable to measure an appreciable gain on dynojet dynos. Factory pro was the only co. in the past that claim to have measured gains with the BMC race filter over stock. The street filter had no gains over the stock one.

http://factorypro.com/images/dynocha...irfilter .jpg

From what I remember reading too is that certain aftermarket filters (cotton gauze type) do flow a little better when dirty compared to a stock filter.

Last edited by Rspec99; 12-08-2008 at 11:45 AM.
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post #4 of 14 Old 12-08-2008, 11:43 AM
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I run a BMC race in my zx14. It flows better than stock, but that also means it lets tiny particles into the airbox in order to have more flow. You might gain one or two ponies with the BMC race (if you also remap), but you do trade a little extra wear and tear on your motor(like most mods).
The BMC street won't flow any better than stock. Only advantage over stock with it is that you can clean it rather than replace it.
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post #5 of 14 Old 12-08-2008, 11:46 AM
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check out pipercross filters as well, they out perform both K&N and BMC

www.pipercross.net/motorcycle

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post #6 of 14 Old 12-08-2008, 12:20 PM
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I had a K&N filter in mine for a while, but I found that it clogged faster. (If you compare the number of pleats in the K&N to the number of pleats in the stocker, the stocker has WAY more, probably 3 times more.)

Stocker did not clog in 24,000 km until I replaced it, K&N clogged up and needed cleaning in about 7,000 km. 'Course, the K&N CAN be cleaned ... but I'd rather just not have to touch it for a longer time. Back to stock air filter for me!


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post #7 of 14 Old 12-08-2008, 12:53 PM
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I have a BMC but I am do most of my riding on the track. With these filters I think there is more maintenance required as in cleaning them more to stay in the top performance range. I forget what the interval is exactly. But I clean mine after every track weekend. I think with any race filter it is that way to get the best performance. As mentioned you do sacrifice filtering for flow.
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post #8 of 14 Old 12-08-2008, 01:39 PM Thread Starter
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Thanks for the info everyone...so far it looks unanimous.

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post #9 of 14 Old 12-08-2008, 03:29 PM
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I put the race filter in my 08 and it ran poorly* until I had it dyno tuned. Considering that the yosh slip-on had been there since day 1 (and those were the sum total of mods) then it clearly had some effect.

No complaints whatsoever since the tune.

*[detonation at lower RPMS and surging between 4-6k]
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post #10 of 14 Old 12-08-2008, 03:33 PM
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Ill sell you my piper cross im going back to stock
got it when it 1st came out from cal sportbike
http://www.calsportbike.com/cgi-bin/...d=1695&count=1

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ASV Levers,Brocks Performance,Carrozzeria Wheels,Core Moto Brake Lines, EarthX Batteries,Sato Racing, SuperSprox..
PM or [email protected] for pricing..

Last edited by 06blackpearl; 12-08-2008 at 03:40 PM.
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