S&S PINION BEARING ROLLERS Harley Big Twin Main Bearing 1958^ OEM 24643-87

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S&S PINION BEARING ROLLER / MAIN BEARING FOR HARLEY BIG TWIN 1958 and UP


Brand new S&S pinion bearing roller for Harley Big Twin pinion shafts 1958 and up. Replaces Harley OEM Part # 24643-87. This S&S Part# 31-4018 corresponds to the "blue" sizing spec from the S&S listed below and fits Panhead, Shovelhead & Evo motors. Please make certain that you are using the right size and purchasing for the correct OEM part number listed above.

Blue - S&S® #31-4018 for H-D® #24643-87A =  Pinion Bearing Roller Size .2504?

Includes snap ring, Part # 50-8057

The correct size is determined by measuring the crankshaft pinion shaft and the pinion bearing outer race in the crankcase, and allowing for the appropriate clearance. Measuring equipment, accurate to .0001" (one ten thousandth of an inch) is essential. The correct, heavy duty, retaining ring must be used with this bearing.