Jims Crank Pin Precision-ground with a slick 16 micron finish or better on the flywheel shafts and all diameters held concentric to a tight .0003. That kind of attention to detail means your crank assembly stays true, delivering reliable performance mile after mile. Trust Jims for the guts of your motor. Features: 3 hole .002 oversize on the bearing diameter Replaces OEM 23975-87 Made in the USA Note: Does not include nuts or woodruff key.