Vintage Dirt Bike Q & A

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 Post subject: MT250 air filter options
PostPosted: Tue Apr 18, 2017 2:46 pm 
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Joined: Fri Feb 03, 2017 10:08 am
Posts: 4
Im working on an MT250, it doesn't have the filter cage or foam in it currently. I have found UNI foam, but dont want to pay $50+ for a new cage. Does anyone know of a K&N or other filter that is sturdy on its own that will work in the 250 box? Or if someone has a cage they'll sell cheap.


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PostPosted: Tue Apr 18, 2017 6:28 pm 
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Joined: Sun Nov 30, 2008 12:10 pm
Posts: 1010
Location: Connecticut, USA
My friend got a UNI NU-4012 filter for his MT w/internal frame between the foam layers, which doesn't require the Honda cage.

http://www.ebay.com/itm/Honda-MT250-Els ... 8H&vxp=mtr

Ray

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'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric


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PostPosted: Wed Apr 19, 2017 7:49 am 
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Joined: Fri Feb 03, 2017 10:08 am
Posts: 4
rayivers wrote:
My friend got a UNI NU-4012 filter for his MT w/internal frame between the foam layers, which doesn't require the Honda cage.

http://www.ebay.com/itm/Honda-MT250-Els ... 8H&vxp=mtr

Ray


Thanks, I had seen that one but didn't realize there was mesh inside the foam. Little pricy but its cheeper than buying the stock mesh.

My other idea was trying to get some chicken wire or similar to form a similar cage, then wrap it in generic lawn mower foam. Likely some zipties to hold it all together. Honestly not sure if that would even be cheaper though once its all said and done.


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PostPosted: Mon Apr 24, 2017 2:07 pm 
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Joined: Tue Jan 27, 2004 8:51 pm
Posts: 136
Location: Gilbert, AZ
DO NOT USE A K&N.
They co$t me 11 pistons, 1 sleeve, 1 crank, numerous rotary valves and more downtime than uptime in 1975-1977 (pre FedEx and UPS days)for my 125 Can-Am enduro.
They don't filter the silt...isn't that what filters are for? [shrugs]

As for rolling your own, UNI sells foam a flat piece of foam around 15 inches square. Stitch the seam. Glue won't last.

Rick


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