Oil pipes on OIF 650 1971-72

[A10 JWO]

What internal size are the rubber oil and breather pipes. I assume they are all the same size. I intend to buy direct from a pipe supplier instead of buying by part numbers, thanks.

[Caulky]

May depend on the model, but my A65L uses 1/4" bore.
I bought mine from here:
http://www.tms-motorcycles.co.uk/store/products/list.asp?cat_id=21

[Bess]

Hi,
    Draganfly list them as 5/16" and they are not too expensive from them:

https://www.draganfly.co.uk/index.php/bsa/bsa/a50-a-a65/1971/category/371-frame

Strangely the oil feed pipe at the base of the engine has the return O/D 3/8", the flow 5/16" O/D and the rocker feed 3/16".

Best wishes...

[A10 JWO]

Thanks lads another part of the puzzle.