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Valkyrie Riders Cruiser Club > General > 1500 Tech Board > Honda OEM Air Filters scheduled changeout too soon...FYI
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Author Topic: Honda OEM Air Filters scheduled changeout too soon...FYI  (Read 1496 times)
98valk
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Posts: 13441


South Jersey
« on: October 10, 2022, 01:32:05 PM »
so as not to hijack Bagger John - #3785 thread anymore will provide info here.
« Last Edit: October 12, 2022, 08:37:45 AM by 98valk » Logged
1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
98valk
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*****
Posts: 13441


South Jersey
« Reply #1 on: October 10, 2022, 01:32:43 PM »
I just checked mine two days ago against some new ones I have on the shelf. Valve adjust, oil change and dial-a-jet hose replacement time. checked the air filter also and will be doing a heat shield mod which I will post about later on.
mine 28k miles zero difference in air flow from a brand new oem.

I did a test yrs ago with a 26k mile one vs new with a spare air box I have, a leaf blower and a CFM meter.
zero difference btwn both.

this time, two days ago, I put both filters on bench top, used a shop vac and put the hose near the end of the filter and tried picking up the filters.  
used 28k filter picked up no problem, new oem picked up no problem.  so then moved hose suction end closer to center incrementally and both filters were picked up exactly the same distance from the end.
so all this indicates a used OEM filter with almost 30k miles on it is flowing exactly the same as a brand new OEM filter.
different type of test, easier to do than the first one but the results were exactly the same.
All filters in the test have had the bottom metal screen removed for more airflow.

Then I have read a SAE air filter report that clearly proved a filter with some miles on it is actually stopping harmful particles from entering better than a brand new filter. There is a SAE report for oil filters also indicating the same esp if one is doing shortened oil change intervals. it was based on the 3k mile oil change. using the same filter actually reduced engine wear.

Now I don't ride on dusty dirt roads every day and/or a lot of construction site areas which would shorten filter life. YMMV
« Last Edit: October 30, 2022, 08:27:15 PM by 98valk » Logged
1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
98valk
Member
*****
Posts: 13441


South Jersey
« Reply #2 on: October 10, 2022, 01:36:21 PM »
https://www.donaldson.com/en-us/engine/filters/technical-articles/servicing-by-restriction/

Air filter service life should be determined by measuring airflow restriction – not by visual inspection alone.

While new Donaldson air filters provide good engine protection, a Donaldson air filter that has been in service for a period of time works even better than a new one. The paper media in the filter is porous, which allows air to pass through it on its way to the engine. As dirty air passes through the filter, contaminant is caught in the media and begins plugging some of the pores.

As more dirty air enters the intake system, previously trapped contaminant helps to filter out even the smaller particles. This makes the filter even more efficient at preventing new contaminant from entering the engine, and the dirt particles become part of the filtering process. This is referred to as barrier filtration.
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
98valk
Member
*****
Posts: 13441


South Jersey
« Reply #3 on: October 10, 2022, 01:36:50 PM »
Replacing filters based on restriction readings can reduce your maintenance costs significantly. Visual inspection of air filters is not adequate and should not dictate service life. Filters that appear very dirty may still contain a great amount of service life.

https://www.donaldson.com/en-us/engine/filters/products/air-intake/accessories/filter-service-indicators/standard-indicators-gauges/
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
Bagger John - #3785
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Posts: 1952
« Reply #4 on: October 13, 2022, 08:15:00 AM »
Hijacking yours a little: My query was for a replacement for a mouse-damaged filter in a buddy's Valk.

Yes, the little sumbeeches are very industrious and determined...
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SPOFF
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Posts: 195


Derry, NH
« Reply #5 on: October 14, 2022, 04:19:59 PM »
I guess the real question is: Can I buy a replacement filter? I had read they were back-ordered without a supplier. I've been thinking my 10-year-old filter might have to go another 20 years.
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98valk
Member
*****
Posts: 13441


South Jersey
« Reply #6 on: October 14, 2022, 04:35:44 PM »
Quote from: Bagger John - #3785 on October 13, 2022, 08:15:00 AM
Hijacking yours a little: My query was for a replacement for a mouse-damaged filter in a buddy's Valk.

Yes, the little sumbeeches are very industrious and determined...

we both hijacked we owe each other a beer.   cooldude
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
98valk
Member
*****
Posts: 13441


South Jersey
« Reply #7 on: October 14, 2022, 04:44:46 PM »
Quote from: SPOFF on October 14, 2022, 04:19:59 PM
I guess the real question is: Can I buy a replacement filter? I had read they were back-ordered without a supplier. I've been thinking my 10-year-old filter might have to go another 20 years.

only aftermarket that is like OEM is made by EMGO. HiFlo makes one looks just like the EMGO.
  I see them on ebay and amazon.
I have two of EMGOs which I'm planning on testing against the new and used OEMs I have.
Initial testing reveals the EMGO has one less pleat than the OEM and has a highly restrictive metal screen system vs OEM. so right off the bat I suspect the filter media they are using flows more than OEM. eye piece inspection of material it looks the same as OEM except for the color.
I found my airflow meter, it was right were I didn't put it yrs ago. LOL
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C  10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp

"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
Bagger John - #3785
Member
*****
Posts: 1952
« Reply #8 on: October 16, 2022, 07:59:53 AM »
If Emgo filters are as effective (or more) on small particulates as the OEM Honda parts I'd definitely consider them instead.
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