The KN filter for the 900 boasts more air flow that the stock. Its also about twice as much money. Is the KN filter really worth the extra change?
You have very good point and i never look at it that way as i am still just learning, but i'm just wondering how much more air flow are you really getting out of the k&n vs. the OEM filter with a sealed air cover?I hate to be a nag, but I cannot stress this enough . The air filter is the MOST IMPORTANT filter on ANY engine!
It takes only ONE oz of dust per 100 cubic inches of engine displacement, getting through the filter, to completely wear the engine beyoind acceptible limits!!
Consider this example: a new 1700 Vaquero, if that bike injests ONE once of road dust over its engine life , if ONE oz of dust gets though the filter ITS SCREWED !!! END OF THE ENGINES LIFE !!!!! ONE OUNCE!!! thats all it takes on a 100 CI engine!!!
I need someone to explain to me how ANY airfilter that boasts increased air flow , can also trap more dirt !!!
I have run K&N filters in the past but NOT any more! Im not going to print any litigious statements. but I cannot be convinced that LONGEVITY of the engine accompanies a racing filter design.
Run whatever you choose?? But to clarify MY point , I have seem{with my own eyes} an 855 ci diesel ruined on a test dyno in 15min by injesting 8oz of dust into its intake . the Dust , had been 'tapped" out of a number of airfilters and collected , weighed & injected into a NEW sacrificial 855 diesel engine, air intake !!!
Your choice folks?? But Im going to go with a filter that focuses upon MAX filtration , rather then max air flow. I cannot see how you can acheive both in the same filter!!
BTW, I have a Qualified Journeyman Diesel ticket , with 40+yrs exp , to add some small creedance to this statement!
For those of you who have used high perf filters , give your throttle bodies, carb throats, the WHITE glove test !!!!!
I am a quality paper filter guy and believe it filters better than a 'performance' filter. The question isn't efficiency but what particle size are we're talking about. I believe a quality paper filter traps smaller particles.My K&N is on it's way here now so I hope it works as they say it does. They say it traps particles with about a 98% efficiency. I wonder how that compares to the OEM filter, do they trap even higher?