Improved ATE Braking
From the Airheads mailing list
I see a question and comments about improving front braking on a 1978 R80 from a single disk to dual. One person said go to brembo brakes.
It can be done, but prepare for a snowflake front wheel, the spoked one won't fit with Brembos. Also you will need the later model down tubes as the attachment of the dampeners is by different means. So you just can't replace the lowers. (But you can use the originals, if one can get some parts machined).
The wheel cylinders were of different sizes, there are some 38 MM units and some 40 mm units, the 40s