The M20 brake stay that I have is made of roughly 22 x 6 mm flat stock. The stay has two 3/8” mounting bolt holes bored through the stay centerline at each end at 375 mm, center to center. You should be able to approximate the overall stay length from that. Hope this is helpful.

email (option): teladelujo@msn.com

Thank you very much John for doing that. Its most helpful, regards, DAVE

Here is a drawing I did for someone a long time back if you can suffer the imperial measurements.



The 3/16" BSC is a dead thread so I would use 10-32 or 2BA for the chain guard mounting screws.

Ray

Thank you Ray, very much. regards, Dave B.