So do you HAVE an existing lug on the frame? Many dont. And what condition is your lug? Is it an original casting or forging? I have seen some frames that appear to have never had the casting/forging and confused on the early BSAs why some have them and some clearly never did.
Then there is the clamp on versions, Both aftermarket and factory.
On some frames either they were broken off and repaired or a previous owners creative repair, So not always the case with hey, use this side stand as it will bolt right up. (Say adapting a B25 unit single stand)
I was planning on posting on here and some other forums a side stand ID thread, as I have some mystery ones I would like to ID. Just havent gotten around to it yet. Staring at parts books with a magnifying glass has only yielded marginal results.
I have had decent luck with these WEN repop side stands, I have heard others complain about them and variations, But personally have been satisfied with the ones I have used. In the past, I have used them on Nortons that didnt have side stands as well, and to prevent them coming loose, I tack weld the inner half of the clamp into place, and safety wire the bolts or loctite to prevent them coming loose. Never snapped off the stand itself.
There is a variation that was a period accy as well. Superiors and Ziewes and apparently highly sought after period accys.. I see crazy prices for them on ebay sometimes. I
had thrown a few away many years ago not realizing they are in demand. I thought they were overly heavy and cumbersome and couldnt imagine anyone wanting to use one. How little did I know!
But the hipsters love these things, one website that has some good examples is this guy,.,,
See:
http://showandgo.blogspot.com/2009/03/zirwes-and-superior-sidestands.htmlIll attch some period advertising. Apparently they made the mounts line up with the engine mounts, I have 2 of these and was debating listing them on eBay as I could use the money for other projects.