Check out this Quality V-Twin Chrome Wagner style master cylinder for disc brake is assembled with internals and includes cap and boot.
Master cylinder is 3/4" bore.
More Information 23-0753
OEM Harley part number: 41761-78
UOM 1 - EA
Finish Chrome
Manufacturer Edart
Origin Imported
Tech Note
Suggested to use DOT 5 fluid

FITS Harley-Davidson
FX 1973-1978
FL 1973-1978