M group oil filter fittings

[John FD]

Last week I changed the various oils in my new-to-me 1954 M33 and found that there isn't an engine oil filter in the tank. I can get hold of a filter element but haven't been able to track down the fitting to hold it in place. Anyone know of a source or even have one gathering dust?

[Dean Southall]

They have been in short supply for some time. I ended up making one with some bits of copper sheet, spring and solder. Some M series owners don't bother with a filter at all and just change the oild regularly (after all many BSAs only have  a crude mesh filter.

[Mike Farmer]

 
Hi

I've just started to make a filter carrier for my A50/A65's and after reading your post am seriously considering making one to fit my WM20. Don't know why I've waited so long.

Mike

[John FD]

I could get hold of a filter then make a carrier for it but the problem is I don't really know how it works or what it should look like. My other bikes (Guzzis) only have a mesh filter and survive on 1500 mile oil changes. The BSA probably won't do 1000 miles a year and I'll change the oil annually. The oil I drained was some of the blackest I've seen in a long time.

If anyone has good photos of the necessary parts for the carrier or drawings it would be really helpful.

[Pete C]

as they used to say on Blue Peter...here's one I made earlier..   

[John FD]

Thanks Pete C. That's nice and clear. I'm sure I could make something like that. I'm learning to use the little lathe I was given last year.

This might be a daft question. How is the filter cap/carrier held down on the filter? Does the oil filler cap just push down on that spring?

This is all new to me.

[Pete C]

Yes, the cap on the tank just presses down on the spring. A bit fiddly at first but I soon got the hang of it.

A lathe is the best present! I couldn't do without mine 

Cheers
Pete

[John FD]

Thanks. I'll get a filter then make something to fit.

The lathe is an old 1930s Myford. It all works and looks to have had very little use. So far I've learnt how to sharpen the tools, set them up and have made various spacers and a couple of special bolts. I didn't cut the threads on the lathe but used it to get the die on straight then cut them by hand. I'm lucky that I have a very knowledgeable friend who is teaching me. Of course it might be so that I don't keep asking him to make things for me on his much posher lathe.