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Sportster Motorcycle Air intake, Carburetor, EFI, Fuel, and Exhaust Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust.

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  #81  
Old 27th October 2009
Don Burton's Avatar
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I just found an answer to my question. http://www.nrhsperformance.com/image...ricaneflow.gif
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  #82  
Old 22nd May 2010
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From my experience coming from the automotive side is that the stock air filter is not at all that bad. I've read many independent test results testing all the main aftermarket brand out there and found that most do flow more air but when it comes to trapping dirt, simply put-they sucked. K&N was one of the worst out there for filtering or lack of. After some research, there are really not much choice for us in air filtration. Ninety percent of AC manufacturer out there uses K&N. I tried to approach AFE (http://afepower.com/) to see if they will develop motorcycle filters and they said not currently. AFE Pro Dry filter tested as one of the better filtering media out there that flowed better than stock and trapped more dirt than stock. I know that Screamin Eagle uses a dry filter but unfortunately, I couldn't find a test that involved them. I'd stick to stock or SE before K&N. There are others out there like NRHS but again, I couldn't find actual filtration results but I do know that use a comparable setup like K&N. There's a balance between flow and filtration. We just have to find it.
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  #83  
Old 25th August 2019
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we seldom ride our bikes off road i assume.
the environment they are used in is fairly clean compared to a jeep or truck.
a performance filter will let through a bit more dirt that is very small.
i doubt it will effect the longevity of a hd motor much. jmho
even a stock filter will let through small enough particles.
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  #84  
Old 25th August 2019
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you can have air filtration without media by using forces of nature or creating them.
aircraft is a good look-see for how it is done.
after-all do you want a 750hp turbine zoonk out mid-flight due to a plugged media???
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  #85  
Old 25th August 2019
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Quote:
Originally Posted by bustert View Post
you can have air filtration without media by using forces of nature or creating them.
aircraft is a good look-see for how it is done.
after-all do you want a 750hp turbine zoonk out mid-flight due to a plugged media???
As an FAA fuel system repair station machinist...i can say there is quite a bit of shit that gets through system. It does horrible damage. AL parts are fragile, but it is difficult to build Monel based planes that have range and capacity.
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  #86  
Old 27th August 2019
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there is no doubt there for sure. most of what i have been around do not even use inlet shielding, just have a particle separator using bleed air switched on in dusty environments.. then again, they are restricted to run hours. on the industrial side we based of TOT and you could get better than a year or more 24/7 run time only down for water wash and maintenance.
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