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Old 04-06-2010, 09:24 PM   #1
rigs_au OP
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Making your own Foam Air Filter

A friend of mine has a Yama XT250 2009 model and there is no after market air filters for them. The stock is a paper piece of crap and costs $25.

Has anyone made their own foam air filter, if so how, and what foam did you use?
Once made it would be oiled as per all foam filters.
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Old 04-06-2010, 09:47 PM   #2
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I would be looking for a similar one to the stocker, in foam of course, and try to get either a straight swap or a swap after minor adjustments. No idea what the specific foam is but it is usually several different densities.

Just had a google looking to see what the thing looks like & couldn't find it after about 5 minutes so gave up.

Sorry, not a lot of help to you!
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Old 04-06-2010, 09:50 PM   #3
sieg
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I've made them but allways from another fillter as posted above, wouldn't make it from just any foam.
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Old 04-06-2010, 10:16 PM   #4
rigs_au OP
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I have seen that you can buy Air Filter foam made by UNI. There is a web site for american cars that sells it.
http://www.americanautos.com.au/

Will investigate further.
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Old 04-06-2010, 10:16 PM   #5
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I had to make one for my Bimota.

I was able to buy a sheet of filter foam, try your local bike shop. The sheet i bought was about 30cm x 30cm x 12mm. From memory it was either uni filter or finer filter foam, as it was filter foam, it needs to be oiled.

The Bimota simply had a flat piece of foam over a stainless mesh gauze. You can make custom shapes up but you will need to source a suitable glue.

Good luck.
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Old 04-06-2010, 10:31 PM   #6
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You can buy sheets of UniFilter foam if you pester your local dealer enough. I have done this to make an air filter for an old TL250 using the original cage.

It might also pay to browse some of the microfiche to see if any other models use the same airfilter. My XR250 has an UniFilter listed for an XR500.
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Old 04-07-2010, 12:34 AM   #7
Clancy
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I made my own for the Transalp, and did what everyone else suggests, and bought a sheet of filter foam. Made up two filters and kept one in a ziplock bag, ready oiled so that it was just a case of changing it in camp if the roads had been really dusty.
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Old 04-07-2010, 01:08 AM   #8
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Quote:
Originally Posted by rigs_au
A friend of mine has a Yama XT250 2009 model and there is no after market air filters for them. The stock is a paper piece of crap and costs $25.

Has anyone made their own foam air filter, if so how, and what foam did you use?
Once made it would be oiled as per all foam filters.
The wife has just got an '08 xt250 and you can't even buy different sized sprockets for them.As suggested,make your own.I will be.

Cheers
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Old 04-07-2010, 04:11 AM   #9
rigs_au OP
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After speaking to the guys at Z Power in Wgong, UNI do make an Air filter for the 08 and 09 XT250.
We asked the local yamaha dealer to source an after market filter and they told us there was not any ...

So dont always believe what the dealer tells you !!!!
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Old 04-07-2010, 04:25 AM   #10
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Quote:
Originally Posted by rigs_au
A friend of mine has a Yama XT250 2009 model and there is no after market air filters for them. The stock is a paper piece of crap and costs $25.

Has anyone made their own foam air filter, if so how, and what foam did you use?
Once made it would be oiled as per all foam filters.
Unifilter in Hornsby will make a filter to suit your bike. Cost is very reasonable - the custom filter I had made for a Transalp cost considerably less than the price of the genuine article. Just send them the old filter. They will make a replacement.

Why stuff around trying to make one yourself, and risk stuffing it up (engines are expensive) when there is this type of service available.

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Old 04-07-2010, 04:28 AM   #11
ditchwitch650
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Quote:
Originally Posted by rigs_au
A friend of mine has a Yama XT250 2009 model and there is no after market air filters for them. The stock is a paper piece of crap and costs $25.

Has anyone made their own foam air filter, if so how, and what foam did you use?
Once made it would be oiled as per all foam filters.
can you post up a pic please?

i have made filters myself before i got the foam from clacke rubber and used a hot glue gun,

sprockets should be the same as ttr 230 xt225 serrow ag200 etc!
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Old 04-07-2010, 04:31 AM   #12
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Quote:
Originally Posted by rigs_au
After speaking to the guys at Z Power in Wgong, UNI do make an Air filter for the 08 and 09 XT250.
We asked the local yamaha dealer to source an after market filter and they told us there was not any ...

Never believe what the dealer tells you !!!!
there you go pete, fixed
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Old 04-07-2010, 04:42 AM   #13
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Quote:
Originally Posted by rigs_au
After speaking to the guys at Z Power in Wgong, UNI do make an Air filter for the 08 and 09 XT250.
We asked the local yamaha dealer to source an after market filter and they told us there was not any ...

So dont always believe what the dealer tells you !!!!
I dont even bother with dealers anymore. If its not a helmet or jacket they are selling, the majority dont have a fucking clue about bike parts!!

If you have a part number, punch it into here www.cmsnl.com/ and see what comes up.

Or just use your model and year and get the part number and see if they can supply it.
I have sourced quite a few Yamaha bits, and Suzuki too, that the dealers around here say are not available!!
No wonder they are in friggin trouble.
If their staff spent the same time learning their jobs instead of applying hair gel and getting face piercings, they might just stay in business a bit longer!!
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Old 04-07-2010, 05:14 AM   #14
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I had an aftermarket filter for my 83 R100RS 25 years ago. The deal then was they'd make you one if you sent them the old oem filter.

They just gutted the pleated paper out from the filter, and inserted some metal mesh into the filter frame, with what looked like a silcone type sealant around the edges to seal/attach it. The mesh wasn't dissimilar to security door mesh.

The two foam layers sat on top..a snug fit to all edges.

They had 2 layers of foam from memory. The lower inner layer was a thin dry foam, but the thicker outer layer needed to be oiled.
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Old 04-07-2010, 05:16 AM   #15
outback jack
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Quote:
Originally Posted by rigs_au
A friend of mine has a Yama XT250 2009 model and there is no after market air filters for them. The stock is a paper piece of crap and costs $25.

Has anyone made their own foam air filter, if so how, and what foam did you use?
Once made it would be oiled as per all foam filters.
You could probably modify the air box or snorkel to take an aftermarket filter like a K&N, the only problem might be getting the jetting right after the mod, not sure you can even by different jets for that bike. The plus side if you could would be a rather large power increase up from 16hp to maybe 19
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