Dellortoman said:Dunno, but it's interesting that a Brembo cap fitted it. I'd be having a close look at the M/Cs on some old Jap bikes from the 70s. Think Honda CB750 or Kawasaki Z1 era. In the 80s, most bikes went to rectangular reservoirs with 4-countersunk screws in the cap.
Is the Brembo cap one of the aluminium ones with the triangle on it. If so, you could sell it, buy a whole new master cylinder and pocket the change![]()