The BSA A7-A10 Forum

Technical => A7 & A10 Engine => Topic started by: Howard on 08.09. 2011 15:23

Title: Original Air Filter
Post by: Howard on 08.09. 2011 15:23
Hi All, My `51 A7 still has the original air filter. The element part of the air filter seems to be rivetted into the housing, I have blown the dust out, but can I wash it without it falling apart ??
Title: Re: Original Air Filter
Post by: muskrat on 08.09. 2011 16:02
I don't think any 60 year old air filter would like to be washed. The element should be held in with screws not rivets.
Cheers
Title: Re: Original Air Filter
Post by: Brian on 09.09. 2011 00:27
I think the original element would be past its "use by" date by now. It should be reasonably easy to replace it with some modern foam.

The actual filter element does rivet into the filter housing but the assembly screws into the filter holder (back of the battery box)
Title: Re: Original Air Filter
Post by: orabanda on 09.09. 2011 05:23
I have two A10's which use the same air cleaner element.
I have replaced the original element media in each of them, with a section cut from a K&N element part number TB-0300 (originally designed to suit BSA triple!!).

There is enough material to fit into two A10 air boxes.

Drill out the 4 rivets which retain the original element.

With careful use of silicon sealant, you will be able to totally seal your "new" element in place.

It has rubber surface on each side, to guarantee a seal across the faces.

The K&N cotton based media is much less restrictive (and more efficient at particle removal) than your original media will be at this stage.

It will last your lifetime, and only require cleaning and re-oiling as per K&N's instructions. Use their oil on the element.

Every bike I have used K&N elements on (BSA's, Yamaha 2 and 4 strokes,) has gained horsepower, and you will need to check your jetting.

For example, my plunger A10 gained 3 hp.

Here is the link to the K&N element:

http://www.knfilters.com/search/product.aspx?Prod=TB-0300

Next time I have an air box off, I will take some pics & post!

Richard
Title: Re: Original Air Filter
Post by: terryk on 09.09. 2011 10:00
good one Richard hows that old Ariel goin did Geof contact you?
Title: Re: Original Air Filter
Post by: orabanda on 09.09. 2011 10:28
Terry,
Didn't hear from Geoff but John Deeth has been a great help; very kind with his time and advice.

I just added another old girl to the list:

(http://i302.photobucket.com/albums/nn82/orabanda/P1040825.jpg)

Can anyone help please; I am looking foir the 90 degree air cleaner adaptor for a B31.

Have shifted house, and am still getting the new shed sorted (more bikes still to move in).



Another project I am undertaking is to get the A10 front forks working MUCH better.

I am currently drawing the whole assembly using Solidworks, so I can use the working model of the fork operation, to build a better mousetrap!

It's the hydraulics engineer side of me!

I will post all of this info (including model) in the future.

Richard

Title: Re: Original Air Filter
Post by: Topdad on 09.09. 2011 11:04
hi, nice setup Richard I'm drooling just looking at the space and the light!!!BobH.
Title: Re: Original Air Filter
Post by: bsa-bill on 09.09. 2011 11:49
Nice shed Richard - pity the BSA siqn is on the wrong side of the profile tho ;) ;)
Title: Re: Original Air Filter
Post by: terryk on 11.09. 2011 10:08
I have a few of those B33s Richard I really like them. Regrettably I just sold one to a mate of mine to finance my daughter's wedding it was a 1950 model. Things we do for the love of our kids.