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filter element?
http://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=5537
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Author:  Harri [ Sat Mar 17, 2018 11:27 am ]
Post subject:  filter element?

Hi all. Original bits are very difficult to find here in the UK. As I have no filter box cage or lid I will have to rely on a filter element and a bit of diy. What filter elements are you guys using? Especially if the originals are not available?

Author:  shoeman1952 [ Sun Mar 18, 2018 11:18 am ]
Post subject:  Re: filter element?

hello,
my filter box, cover etc. needed to be blasted inside and out after being off the road for 5 years (mice pee), and then painted. easier for me to install a UNI 4300AST dual stage filter. i used a very short section of 3 inch exh pipe to connect from the rubber adapter to the UNI. i selected a filter that was angled slightly up, for clearance to a frame crosspiece. also had to trim the fender a smidge.

can send pics if you'd like, but a little later as i'm going out snowshoeing this afternoon. 22 F : )

Author:  Harri [ Sun Mar 18, 2018 2:20 pm ]
Post subject:  Re: filter element?

That's interesting. I was thinking of buying some filter foam and having a go at making a filter but your idea sounds good. So yes, any pics would be good. thanks

Author:  Harri [ Sun Mar 18, 2018 2:20 pm ]
Post subject:  Re: filter element?

That's interesting. I was thinking of buying some filter foam and having a go at making a filter but your idea sounds good. So yes, any pics would be good. thanks

Author:  shoeman1952 [ Mon Mar 19, 2018 7:55 am ]
Post subject:  Re: filter element?

bike is mid-project, but here is a pic of the filter. carb inlet rubber ID and uni filter inlet ID are both around 3inch, so i cut to length a piece of 3inch exhaust pipe. cut length so each end is fully seated, but as short as possible for less overhang. seems rigid enough, but i may secure the assembly to the frame. i still need to fab a shield below the stock fender. i'll be running the stock side covers.
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Author:  Harri [ Mon Mar 19, 2018 10:14 am ]
Post subject:  Re: filter element?

Nice job, that should well do the job. I still have the filter box fitted so I will have the filter element fitted inside the box. Your set up could still work with mine. thanks.

Author:  rayivers [ Mon Mar 19, 2018 12:11 pm ]
Post subject:  Re: filter element?

Re-Mx has the UNI NU-4012 MT250 air filter, which has a plastic cage built into it and doesn't need the often-lost-or-rusted-out OEM filter cage:

http://re-mx.com/honda-mt250-air-filter

Ray

Author:  m@tt [ Sun Apr 08, 2018 3:12 am ]
Post subject:  Re: filter element?

I’m using the UNI filter- but probably have an original cage kicking around if you’re looking for one

Author:  ruouthere [ Mon Apr 16, 2018 7:20 pm ]
Post subject:  Re: filter element?

As Ray mentioned the Re-Mx has the UNI NU-4012 MT250 air filter, which is what I purchased for my restoration.

Works very well.

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