Crankcase & Bottom End

57 products

Shop the range of aftermarket motorcycle engine products at Pro Class Custom Parts.

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$960.99

Features & Benefits:- * Meets or exceeds OEM specifications * Come completely fitted and ready to install * Complete set includes a two-hole crankpin, aluminium retainers, bearings, nuts and f...

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DAYTONA JAPAN

$718.99

Features & Benefits:- * Meets or exceeds OEM specifications * Come completely fitted and ready to install * Complete set includes a two-hole crankpin, aluminum retainers, bearings, nuts and fo...

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DAYTONA JAPAN

$733.99

Features & Benefits:- * Meets or exceeds OEM specifications * Come completely fitted and ready to install * Complete set includes a two-hole crankpin, aluminum retainers, bearings, nuts and fo...

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JIMS

$565.99

Kit Includes: * 1 – 24006-80/83, Pinion shaft * 1 – 2196, Metered oil jet screw * 1 – 24016-80, Flywheel side nut * 1 – 2187, (HD # 11218), Flywheel side key * 1 – 2480, (HD # 23985-54), Pinion ge...

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JIMS

$568.99

* Made from 52100 aerospace-quality Timken bearing stock * Sold as a set * Made in the U.S.A Kit includes: * 1 – 24006-73, Pinion shaft * 1 – 24023-36, Flywheel side nut * 1 – 24023-54, Pinion sid...

JIMS

$532.99

Features & Benefits:- * Machined from solid bronze bar stock. * Hold concentricity to less than .0002″. * Includes Sprocket Shaft # JM-23909-80. * Includes Sprocket Side Nut # JM-24003-55. * F...

$406.99

Features & Benefits:- * Includes standard size crankpin, pinion oil pump key and nut * Replaces OEM # 23961-80 * Made in the U.S.A. Tech Tips:- Fitment Note: Torque crankpin nuts to HD specs 1...

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$406.99

Features & Benefits:- * Made in the USA * 1.249″ * Replaces OEM # 23961-41 & 23966-54A Tech Tips:- * Torque crankpin nuts to H-D specs 180-210 ft/lbs for both OEM & S&S forged flyw...

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JIMS

$407.99

* All ground diameters are concentric to within .0003″ to simplify flywheel trueing and rebuilding * Constructed of only domestic steel * Replaces OEM # 24006-58 * Made in the U.S.A.

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JIMS

$341.99

* Sold each * Made in the U.S.A. * Replaces OEM # 24599-93

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JIMS

$341.99

* Sold each * Made in the U.S.A. * Replaces OEM # 24599-58A

$245.99

Features & Benefits:- * Genuine Timken Bearing. * Left Hand Crank Case Bearing. * Replaces OEM # 9028 Proudly Made in the USA!

$544.99

Features & Benefits:- * Includes 1 x Front Rod Race # SS34-4005 * Includes 2 x Rear Rod Race # SS34-4006 * Includes 2 x Wrist Pin Bush # SS34-4007 * Replaces OEM #’s 24356-36A 24345-36A & ...

EASTERN MOTORCYCLE PARTS

$296.99

Features & Benefits:- * Genuine Timken Bearing. * Left Hand Crank Case Bearing. * Replaces OEM # 24729-74 & 48302-85 Proudly Made in the USA!

$6,047.99

The demand for performance-based Softail parts is growing, and these M8 engines are creating more power daily. All that power requires a quality base that the stock cases can’t provide. That’s whe...