Procycle (www.procycle.us) has a magnet for the DR650 oil filter than should work for the savage.  It is a bit pricey at 12 bucks, but has a really good strength to weight ratio.  You could catch some air on your bike without dislodging the magnet.  Maybe there is a similar magnet out there, just as strong for 5 bucks or less. It doesn't look difficult to manufacture.  

Once you hold one of these relatively large strong things in your hand and put it next to a piece of steel I think you will be able to answer your own question.

The spring that pushes the filter back into the housing to seat it on the "O" ring is of a fixed low strength.   Magnetic force increases by the inverse square law, the closer you get the stronger it gets.

The answer about gluing the magnet to the cover is "something is gonna move some when you hit a bump" and my bet would be you'd find the glued magnet in full contact with the steel filter can, the little spring compressed & helpless and oil input flow connection at the back of the housing popped open and the oil bypassing the filter completely.

Besides, you want the magnet in contact with the filter can -- when you do this the inner steel core of the filter gets magnetized and acts as the final post paper magnetic trap for the very very fine particles.

Oldfeller--FSO wrote on 01/04/11 at 12:31:09:


True, by sticking the magnet on the filter, you're effectively magnetizing a much larger area that can snag metal out of the oil flow.  I suppose one could epoxy the magnet to the case, but then that would preclude using the donut shaped magnet, because you'd either not be magnetizing the filter, or you filled the whole gap and lost the function of your bypass valve.

For those of you who may be considering magnetizing their oil filter. This is a good place to get neo magnets. It's where I get the magnets for my wind turbine project.

http://stores.ebay.com/Neodymium-Magnet-For-Less/Neo-Rings-Tubes-/_i.html?_fs...

Folks have been struggling to find an appropriate magnet that is big enough to do the job and still light enough to be supported by the can/spring/"O" ring mounting system.

This one currently is available for $8.75 and it is the original magnet that the trick was worked up with.


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Price your magnetic drain plugs, they were $17 when I bought mine many moons ago.  They work, but they don't get it all on every pass like magnetizing the oil filter can does.   Awful small magnet for twice the price that this 10 times larger ring style magnet goes for ....

This is $8.75 plus shipping and is a whole lot more magnet.

http://www.supermagnetman.net/product_info.php?cPath=41&products_id=404



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The huge magnet that is shown in the thread is currently unavailable, sorry.   Should it ever come back, we'll put a note in here.

This is a tech thread, not a Cafe or RSD discussion -- if you want to fight over the best kind of magnet to use (or none at all) go crank yourself up a Cafe discussion thread and have at it.

This Tech thread is locked to further comments.