24 TOOTH LOW GEAR COUNT- ER SHAFT.FITS 4-SPEED BIG TWINS WITH 2.66 CLOSE-RATIO SET-UP.
Source: Custom Chrome
The 2.447 close-ratio first gear set is best for FXs; 2.660 ratio for FLs. Both sets provide a higher first gear and eliminate second gear clunk, and permit use of a larger engine sprocket for easier starting. Fit Big Twins from 1936 thru 1986.