If memory serves me, its a motorcycle master cylinder BMW? I believe
they cut it down from the original, good luck getting your inspector
to sign off on installing it!
JJ

Mike McCarron wrote:
My club has a 1983 Grob 103 Twin II that needs a new master cylinder. Over
the years the Grob factory has made changes to the system without full
documentation and as a result the US distributor can not be sure of how I
go about purchasing the proper master cylinder for this glider.

If you or anyone you know has replaced the master cylinder on a vintage
Grob 103 Twin II recently I would appreciate your input on where I might
purchase the correct system.

Thank you,

Mike