Crankcase & Bottom End

56 products

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

$4,276.99

Features & Benefits:- * Heat-treated 4140 material is harder & 114% stronger than stock. * Harder material, eliminates thrust washer. * Larger 1.671″ diameter crankpin. * Designed with inc...

$4,273.99

Features & Benefits:- * Without Sprocket Shaft Race for use with the Timken Bearing Upgrade. * Replaces the Stock Crankshaft in 96ci,103ci & 110ci Engines. * OEM style Tapered Wristpin End...

$4,046.99

Features & Benefits:- * Without Sprocket Shaft Race for use with the Timken Bearing Upgrade. * Replaces the Stock Crankshaft in 96ci,103ci & 110ci Engines. * OEM style Tapered Wristpin End...

$4,271.99

Note: This S&S 4-1/2″ stroke flywheel assembly when used with 3-7/8″ cylinders creats 106 cubic inch’s 1. Purchase S&S 3-7/8″ piston kit # SS92-1210 & bore your current cylinders Fea...

$4,041.99

Features & Benefits:- * Heat-treated 4140 material is harder and 114% stronger than stock * Harder material, eliminates thrust washer * Larger 1.671″ diameter crankpin * Designed with increas...

$4,046.99

Features & Benefits:- * Requires the Timken Bearing Sprocket Shaft Crankcase Sleeve & Tool Kit # JM-959. * Requires Timken Bearing Assembly # SS31-4013. * 3 Piece Assemblies. Tech Tips:- *...

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$4,046.99

Note: This S&S 4-1/2″ stroke flywheel assembly when used with 3-7/8″ cylinders creats 106 cubic inch’s 1. Purchase S&S 3-7/8″ piston kit # SS92-1210 & bore your current cylinders Fea...

$4,044.99

Features & Benefits:- * Also Fits Dyna 1999-2005. * Also Fits Touring 1999-2006. * 2003-2006 motors can be upgraded to the stronger Timken Crankcase Bearing. * Heat-treated 4140 material is ha...

$1,772.99

Features & Benefits:- * Includes Oil Pan. * Allows the installation of S&S engine or crankcase into Dyna 2006-2017. * Oil pickup tube routed to the rear of the oil pan for extended high ac...

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DAYTONA JAPAN

$996.99

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

$746.99

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...

DAYTONA JAPAN

$761.99

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...

DAYTONA JAPAN

$745.99

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...

DAYTONA JAPAN

$735.99

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...

JIMS

$558.99

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...