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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

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Pinion Gears for 1954–E77 Big Twins

 
 
 
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Description
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Specs
Fitment
Instructions

High quality S&S pinion gears are carefully machined, heat treated and then finish ground.

 

Three distinct year groups, in up to eight different color coded sizes for optimum gear lash, are available for big twin engines. S&S color codes match Harley-Davidson® color codes so that replacement is easy. Just pick the appropriate color S&S gear that matches the color on the damaged stock gear (see notes).

 

S&S® Big Twin Style Pinion Gear Selection Chart 
Year Biggest Average Smallest 
Color Code
H-D® Part Number

S&S Part Number
1954–'77   Orange

33-4121 
Black
 
33-4122 
Red
– 
33-4123 
Blue
– 
33-4124 
Green
HD#24010-54 
33-4125
White
HD#24010-54
33-4126
Brown
– 
33-4127
Yellow
– 
33-4128 



 

 

 

 

 

 

 

 

 

 

NOTES: If the stock gear is unmarked and the size is unknown or you are scratch building an engine and have no gear, we recommend that you order a gear in the middle of the size range. These sizes were used more often and should provide adequate gear clearance under most circumstances. When in doubt, use a gear from the middle to the small side of the range, because a combination of looser fitting smaller gears is less likely to cause binding and premature wear. Consult the chart for the size and appropriate part number required. If you wish to achieve optimum cam gear to pinion gear fit, consult your factory service manual for instructions on fitting these gears before making a selection. Some sizes, particularly those on and near the ends of each range, are available on a limited basis because they are the extremes.

 

All reference to H-D® part numbers is for identification purposes only. We in no way are implying that any of S&S Cycle's products are original equipment parts or that they are equivalent to the corresponding H-D® part number shown.

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