Harley Sportster Master Cylinder Stiffener; 1983-90 (OEM #34909-83)
OEM references show a few different part numbers, but we know this bracket fits all sprocket covers from 1983-90. To verify fitment, measurements are as follows:
Rear two holes: 2 1/4" center-to-center
Front two holes: 4 1/8" center-to-center.
112122 C-1 (21 09 26, 2-55.23)