NOS Harley Davidson FX FXE Riser Clamp 1971 – 1973 56104-73 Date January 31, 2018Posted by claynes This is a discontinued obsolete part from Harley Davidson. This is for the FX / FXE with 2 piece handle bar. The part number is 56104-73. New in the box. Can be used in other applications where 2 piece handle bars are desired.