HI, I have 1958 m21 does anyone know if I can use A -B swingarm triple trees on this bike? looks like only difference is the fork stops are slightly lower. Thank you for any help. Charlie

email (option): millcrocfarm@gmail.com

I can't help with your question, but don't forget this is the "WD Motorcycle Forum" so I may not be the only one, if its Ian's advice you want you could contact him directly.

Rob

email (option): robmiller11(a)yahoo.co.uk

The entire front end including the wheel will swap over happily.
BSA used the same steering cup centers on just about everything .
However just about every model used a different width axel so the spacing of the down tubes will most likely be different.

thank you for your reply, put all parts together does look like they fit, steering stops a little lower thanks again Charlie

email (option): millcrocfarm@gmail.com

You can use the swinging arm yokes (triple trees) without modification...Dimensionally they are interchangeable...Ian

email (option): ian@wright52.plus.com