The truth about RC air filters - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 27 (permalink) Old 09-15-2012, 09:34 PM Thread Starter
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The truth about RC air filters

We've all seen the dyno pulls showing a drop in hp from swapping oem filters for aftermarket, but what is this really from obviously most will think its from flowing too much air and creating turbulence in the air box but has anyone ever checked? actually flowed the filters to see if this is the problem? One thing to consider is maybe they are flowing less air from being able to filter out smaller particles. If this was found to be true i would much rather be down a couple of hp and keep my motor as clean as i can on the street. and keep a set of oems for the track if i found it that necessary.

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post #2 of 27 (permalink) Old 09-15-2012, 10:33 PM
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I doubt that the small particles that might not get filtered by the OEM filters would actually do much. Don't buy into the marketing hype.




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post #3 of 27 (permalink) Old 09-16-2012, 12:12 AM Thread Starter
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Yeah im not saying you gota go out and buy some k&n's so your bike dont blow up in 1000 miles but do you think it could make a difference between going 50k or 100k miles without a rebuild?

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post #4 of 27 (permalink) Old 09-16-2012, 07:54 AM
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Nope, not at all. Anything that small getting through the OEM filter isn't going to make a difference. Honda built the RC as a street bike. I trust them enough to have an air filter that fits the bill. Stick with OEM, you can't go wrong.

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post #5 of 27 (permalink) Old 09-16-2012, 03:44 PM
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Originally Posted by RickyBobbyv8 View Post
Yeah im not saying you gota go out and buy some k&n's so your bike dont blow up in 1000 miles but do you think it could make a difference between going 50k or 100k miles without a rebuild?
I think frequent oil changes with quality oil and filters are going to do much more than air filters. But what do I know, I only have something like 13k on mine.




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post #6 of 27 (permalink) Old 09-16-2012, 06:34 PM Thread Starter
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I think frequent oil changes with quality oil and filters are going to do much more than air filters. But what do I know, I only have something like 13k on mine.
Thanks for the imput guys, on a side note what kind of oil filters are you guys running? I've always used oem Honda but I cut one open the other day and wasn't very impressed, looks like a fram on the inside, paper filter material, and I have seen sevral fram failures and will no longer put then on anything I own, this doesn't mean that the oem's will fail but I'm just scared of them, has anyone run the royal purple filters?

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post #7 of 27 (permalink) Old 09-16-2012, 08:15 PM
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I use k&n oil filters because that's all the cycle gear by me has

For the record I've used fram filters religiously on every automobile I've ever had (hundreds of thousands of miles) and never had an issue with one. I've been a member of several different car, truck and motorcycle forums over the years and have only ever heard of one failure of a fram filter.
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post #8 of 27 (permalink) Old 09-16-2012, 08:40 PM Thread Starter
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I use k&n oil filters because that's all the cycle gear by me has

For the record I've used fram filters religiously on every automobile I've ever had (hundreds of thousands of miles) and never had an issue with one. I've been a member of several different car, truck and motorcycle forums over the years and have only ever heard of one failure of a fram filter.
I also used fram a while back but after 2 failures caused by the paper filter falling apart and starving the motors of oil I will never use them again, a rep for Jasper engines also informed me that they broke contract with fram because of multiple failures and no drain back diaphragms. I'm not saying people don't run alot of fram filters all around the world and get away with it but all it takes is just one faulty filter to destroy a 15k dollar motor. Compared to the royal purple filters the frams are at an obvious disadvantage cut one open and you'll see what I'm talking about.

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post #9 of 27 (permalink) Old 09-16-2012, 09:24 PM
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I buy my Purolators here



and OEM filters without the mesh work well for me.



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post #10 of 27 (permalink) Old 09-16-2012, 09:50 PM Thread Starter
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I buy my Purolators here http://www.amazon.com/gp/product/B00...ls_o06_s00_i00

and OEM filters without the mesh work well for me.
Can you buy them without the mesh or do you mod them and what is the point of not having the mesh?

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