Crankcase & Bottom End

62 products

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

$4,713.99

The Crankshaft is the heart of any performance engine and S&S Cycle has been perfecting the art for over six decades. Stronger, more durable, and trued to a spec others can only dream of, our ...

$4,444.99

Features & Benefits:- * Natural Aluminium Finish. * Perfect for stock replacement & high performance applications * These crankcases offer some unique features. * Besides being machined f...

JIMS

$494.99

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. ...

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JIMS

$383.99

* Single Cam Models ONLY Use With: * Nuts x 2 x SS34-2104 * Key x 1 SS50-1009 * Made in the U.S.A.

DAYTONA JAPAN

$768.99

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

$762.99

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...

$6,375.99

These cases are designed to accept cylinders up to 4 1-2″, which is massive, & they have a case with a spigot bore of 4.695″ The demand for performance-based Softail parts is growing, and thes...

DAYTONA JAPAN

$1,060.99

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...

$329.99

Features & Benefits:- * Fits Softail, Dyna & Touring 2003-2006 Left Hand Case. * Fits Softail 2000-2006, Dyna & Touring 2003-2006 Right Hand Case. * Sold Each. * Replaces OEM # 24604-0...

EASTERN MOTORCYCLE PARTS

$324.99

Features & Benefits:- * Kit includes 2 x Thrust Washer (OEM#8972), 1 x Bearing (OEM#34605-07), 1 x Retaining Ring (OEM#35114-02) & 1 x Bearing Race (Not sold Separately) * Replaces OEM # 2...

$4,255.99

Features & Benefits:- * Includes new Sprocket Shaft Race for OEM type Main Bearing. * Replaces the Stock Crankshaft in 96ci,103ci & 110ci Engines. * OEM style Tapered Wristpin Ends allow u...

$4,032.99

Features & Benefits:- * Includes new Sprocket Shaft Race for OEM type Main Bearing. * Replaces the Stock Crankshaft in 96ci,103ci & 110ci Engines. * OEM style Tapered Wristpin Ends allow u...

$4,260.99

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...

$4,255.99

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...

$4,032.99

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...