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K&N Air Filter discontinued?

669 Views 26 Replies 11 Participants Last post by  yorkie
I've owned this 2005 since the Spring of 2006. I managed to put around 15k miles on it over the years, but admittedly haven't rode it at all in the last 2 or 3 years. This week, I got motivated enough to put a new battery in it and see if it would start on 2.5 year old gas. To my surprise, it did. It won't hold an idle, but I was able to get it out on the road and give it an Italian tune-up. Yesterday I pulled the tank, drained it, and started looking over all the other items I've neglected over the years. The oem air filter is starting to disintegrate, so I thought now would be a good time to put a K&N drop in filter in, but I can't find one anywhere online. Every site that has a listing for the KA-5087 says "out of stock" or "not available". I found 5 at an ebay store in Australia, but the shipping is more than the filter, raising the price to around $200. I don't think I want one that bad. Does anybody have a source for these in the US, or is there a second-best option like Uni Filter or HiFlo?
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Only one I found, was 2 years ago, a used K&N.
Consider yourself lucky. I personally wouldn't use a K&N if you gave me one. Putting on my flame suit, as I'm sure there are folks on here who love K&N.

BTW, that is a beautiful time-capsule of an EX..!!
Does anybody have a source for these in the US, or is there a second-best option like Uni Filter or HiFlo?
Take look around this forum on this. I posted part#s & where to buy them….prices too
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Take look around this forum on this. I posted part#s & where to buy them….prices too
I did a search for a while this am looking through the forum and particularly your threads did not see it.

Good stuff, thank you!
It wasn’t one of my threads but a response to another K&N thread.
To quote myself from the “cone filter manifold” thread:
After a quick 2 minute search on the interwebz I found that Dennis Kirk carries a UNI OEM replacement air filter for $30 p/n NU-2368 and a HiFloFiltro OEM replacement filter HFA-2503 for $14.95. Those are for the Gen 2s. The UNI is also available on Amazon for $27.50.

HiFlo information shows the same p/n for the air filter from ‘87-2009. BMC no longer makes one for the EX-500 and all the K&N website shows is pods for anything older than around ‘96 and all EX500s.(you probably knew that already) I searched Piper Cross also but found nothing on the site I visited.
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Only one I found, was 2 years ago, a used K&N.
yeah same here, a year after getting the gen 1 back on the road (on the winter service) I found the bike had eaten most of the stock foam filter :confused: Argh, So I looked for a K&N thinking I would only ever have to buy one, but I couldn't find one anywhere in the UK or mainland Europe.
I considered buying a K&N pancake filter and cutting it down to the stock carcase size and gluing it in place (a sort of DIY K&N) but before starting the project I realised my mistake (not oiling the stock one) so I bought a cheap High flow paper element one off E-bay oiled it and had no more issues. still using that high flow been 6 years now still going, yearly clean and reoil all it needs. so in fact I didn't need a K&N anyway.
Nice looking bike. Just go with a Uni-filter. Flows almost as good, and filters better.
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I also was specifically looking for a k&n myself. I ended up writing them asking if they had a way of seeing if maybe due to age the filter wasn't showing as made anymore and could check to see if a newer model of something else's may be the same filter....they informed me they have universal fitting ones where you measure your stock filter and compare or look up in their system to try and find one. When I went to measure my air filter I found I already had a k&n installed so my journey for air filter ended up stopping there.
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In any event, they may have been talking about their "pod" filters, which work fine - just not on the EX. As to the OEM filter, it is purpose-built to fit the airbox and I sincerely doubt that ny universal filter would fit. If one would, why did they make a dedicated filter in the first place? Since the EX has been out of print for 14 years now, the demand has dropped off to near zero. So it is nursing current filters along or looking for NOS units.
Thanks for the replies. I ordered one from the link that Turbulence posted. That place is in the UK, and I got an order confirmation, so I guess so far so good. Hopefully it won't take all summer to get here. If it falls through, I'll go with the Uni-Filter.
postage from the UK to the USA is pretty reliable and speedy (most of the time) the issue is usually when the destination is reversed. USPS seems to be the sticking point in my experience.
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postage from the UK to the USA is pretty reliable and speedy (most of the time) the issue is usually when the destination is reversed. USPS seems to be the sticking point in my experience.
They are a sticking, cussing throwing a fit point for me. Everything I have ordered over the last year sits somewhere in a sort facility for 2 to 3 days before it starts moving. One day for the project truck I am working on right now the item was an hour away was tempted to just go get it instead of having it delivered.
yeah I believe you. over the last few years I've been a dab hand at getting bits from abroad, some places are amazing but others, afraid to say the US is somewhere at the bottom of the list.
I ordered two OEM full carb kits direct from Japan (not cheap but everything was in them) on Monday afternoon they dropped in the mail box 4 days later on Friday.
yet when I ordered some small parts (not available anywhere else) from salvage yard in the US it took that long just to arrive in Miami, where they sat for almost 2 weeks, eventually arriving in the UK 3 weeks after ordering.
but from Heathrow (London) they arrived the very next day, oh and shipment cost was eye watering. the kits from Japan were post free.
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I just got a new UNI filter last year.
The K&N arrived today. Not bad. Ordered it Friday, and it made its way across the pond by Thursday.
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Has anyone been able to find a US-based store with any KA-5087's in stock? How do the other (cheaper) air filters stack up against the KN when it comes to a FOG'ed up ninja? I'm going to send an email to K&N to let me know what's up with it.


Busted my baiku wide open and man, she is blown tf out.. good lord...

Looks like it's possibly an OEM boy, and she an '09. It's incredible that she still starts right up even after sitting a short while. I assume that if this wasn't noticed, then it's fair to say the carbs haven't been cleaned, spark plugs changed, so on and so on. I'm worried that once she gets running and the particles in the carb get all kicked up she'll have some issues, but starts fine as long as the particles are settled.

That being said I have no reason to suspect I'm going to be having any issues running/whatever, but I assume all of that garbage is somewhere deep within my babygirl.... Ik there's a couple threads on this specific topic of blown out air filters, but any suggestions what to do? I'm still super reluctant to start a thread for any and every ol' question I have that I don't feel is sufficiently answered by my forum searches and/or the archive.
I'm probably going to purchase the KA-5087 if there's no real comparable alt for it. There was one other site (in a place other than NZ) I could find called smart-stuff parts that has it listed for $64.92, but looking at the websites terrible rep, I'm not skimping on money to risk it. So I'll probably go with the UK site from the link earlier in the thread.
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