Crank Pins & Nuts by Jims
We start with a special order of steel from an American foundry, then saw, turn, mill, and grind all on numerical controlled machines. From sawing to the final phase of machining, each part is thoroughly inspected, and after heat treating, all threads go through a special process to make them withstand greater torque stress. On crank pins, approximately 50% more torque can be applied. All flywheel shafts are ground to a 16 micron finish or better unless otherwise specified. All ground diameters are concentric to well within .0003”, or less, to simplify all phases of flywheel truing and rebuilding. We strongly recommend using JIMS® high performance nuts.
 
Crank Pin and Nut Kits
TEC #   Jims
89298 3 Hole Pin 180 offset w/ Nuts 23961-80ASK
89297 3 Hole Pin, Nuts & Keys Fits 'L81 up 23961-80A3
89296 2 Hole Pin, Nuts & Keys Fits 'L81 up 23961-80A2
89276 3 Hole Pin, Nuts & Keys Fits '41-E81 23961-413
89275 2 Hole Pin, Nuts & Keys Fits '41-E81 23961-412
 
Crank Pin Big Twins Late ‘81-99
TEC #   Jims
89300 1 Hole 23961-80A1
89278 2 Hole 23961-80A2
89299 3 hole Std 23961-80A3
89293 3 hole O/S +001 23974-87-3
89295 3 Hole O/S +002 23975-87-3
89286 3 Hole  180 Offset 23961-80A
89280 Crank pin nuts ‘81+ Jims 23969-83
 

Crank Pin Big Twins 1941-Early ‘81

89282 2 Hole 23961-412
89284 1 Hole 23961-41
89303 3 Hole 23961-413
89285 180 Offset 3 Hole 23961-41S
89283 .025 Shorter 3 Hole 23961-41ST-3
89304 Crank pin nuts ‘54-81 Jims 23966-54
 

Early Model Big Twin Crank Pins

89306 K Model ‘52-53     3 Hole 23960-52
89307 61/74/80” ‘37-48 3 Hole 23962-40
89308 45” Model ‘37-73 1 Hole 23960-29
 
Sportster Crank Pins
TEC #   Jims
89301 XL   ‘54-E81 2 Hole 23960-542
89302 XL   ‘54-E81 3 Hole 23960-543
89309  XL   L‘81-99 2 Hole 23960-80A2
89310  XL   L‘81-99 3 Hole  23960-80A
89305 XL Crank pin nuts '54-81 23967-54
89281 XL Crank pin nuts ‘81+ 23901-81
 
Chrome Moly Crank Pins 100” Case Hard ACA
“A CUT ABOVE TM” crank pins come complete with JIMS® ultimate nuts and key. These high quality crank pins took three years to develop due to our high standards. “A CUT ABOVE TM” crank pins come in two and three hole versions only, and are guaranteed against failure
TEC #   Jims
89287 Big Twin Chrome-Moly ‘41-E81 23961-41
89288 Big Twin Chrome-Moly L81-99 23961-80
89289 Sportster Chrome-Moly L81-99 23960-80