Crankcase & Bottom End

57 products

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

$395.99

These American made Torrington rod bearing sets consisting of three packaged bearings with 16 rollers in steel cages. They will retro fit back to 1941. They are available in a standard size only. ...

$351.99

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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$351.99

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...

JIMS

$322.99

* 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. MFR PART No...

JIMS

$302.99

* Single Cam Models ONLY Use With: * Nuts x 2 x SS34-2104 * Key x 1 SS50-1009 * Made in the U.S.A. MFR PART No: 23974-873 ROLLIES PART No: JM-23974-873

JIMS

$274.99

* Sold each * Made in the U.S.A. * Replaces OEM # 24599-93 MFR PART No: 24599-58B ROLLIES PART No: JM-24599-58B

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JIMS

$274.99

* Sold each * Made in the U.S.A. * Replaces OEM # 24599-58A MFR PART No: 24599-58A ROLLIES PART No: JM-24599-58A

$212.99

Features & Benefits:- * Genuine Timken Bearing. * Left Hand Crank Case Bearing. * Replaces OEM # 9028 Proudly Made in the USA! MFR PART No: 31-4013 ROLLIES PART No: SS31-4013

$471.99

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

$210.99

Features & Benefits:- * Genuine Timken Bearing. * Left Hand Crank Case Bearing. * Replaces OEM # 24729-74 & 48302-85 Proudly Made in the USA! MFR PART No: A-24729-74A ROLLIES PART No: EM...

$5,990.99

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...

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$5,491.99

The demand for performance-based bagger 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 wher...

$4,034.99

Features & Benefits:- * Wrinkle Black. * Perfect for stock replacement & high performance applications. * These crankcases offer some unique features. * Besides being machined for a crank...

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$4,034.99

Features & Benefits:- * Wrinkle Black. * Perfect for stock replacement & high performance applications * These crankcases offer some unique features. * Besides being machined for a crank ...

$3,890.99

S&S has been making stock bore stroker kits since the early 1960s. Theyre still popular today due to the excellent power gains for the money, as well as the easy installation. Stock bore stro...