S&S, pinion gear 54-77. Black

54-E77 B.T.(NU)

Note: All S&S pinion shaft gears are designed to be used with a 73-99 B.T. style 24T driven gear (OEM 26345-73 / MCS 531209 S&S). Color coding sequence is identical to stock H-D coding. When in doubt use a gear from the middle to the small side of the range. A combination of smaller gears should provide adequate gear clearance under most circumstances. Both excessive and zero gear lash combinations cause engine noise, but no gear lash causes binding and premature wear. Sizes are as follows: 915687 Orange (biggest). 909055 Black. 909060 Red. 909065 Blue (average). 909070 Green (average). Repl. 24010-54. 909075 White Repl. 24010-54. 909080 Brown (discontinued). 909081 Yellow (smallest).