Crankcase & Bottom End

57 products

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

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$4,435.99

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 ...

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$3,872.99

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 ...

$4,435.99

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 ...

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$4,215.99

Features & Benefits:- * Can also be used to upgrade your 1200cc Engine 1973-1980 to 1340cc/80ci Engine. Tech Tips:- * Upgrading your 1200cc Engine 1973-1980 to 80ci/1340cc Engine requires the...

$4,224.99

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 ...

$3,575.99

Features & Benefits:- * Stock Replacement. * 1990-1999 models require purchase of pinion shaft conversion kit # SS33-4148. Proudly Made in the USA by S&S Cycle ! MFR PART No: 32-2239 ROL...

$3,670.99

Features & Benefits:- * The S&S Super Stock alternator style crankcases are perfect for stock replacement & for high performance applications. * Pre-clearanced for strokes up to &...

CP CARRILLO PISTONS

$2,418.99

Features & Benefits:- * Sets balanced to + or – 1 gram * Made from a forging * Laser engraved * 100% Magnafluxed * Fully CNC Machined * Shotpeend Tech Tips: * Material # 10087 * Rod # HD-MILW...

CP CARRILLO PISTONS

$2,420.99

Features & Benefits:- * Sets balanced to + or – 1 gram * Made from a forging * Laser engraved * 100% Magnafluxed * Fully CNC Machined * Shotpeend Tech Tips: * Material # 5367 * Rod # HD-VROD&...

$1,402.99

Features & Benefits:- * 7.440″ Rod Length. * Sold as a Pair. Tech Tips:- * Torque crankpin nuts to H-D specs 180-210 ft/lbs for both OEM & S&S forged flywheels. * Greater torque will ...

$1,332.99

Features & Benefits:- * 7.440″ Rod Length. * Sold as a Pair. Tech Tips:- * Torque crankpin nuts to H-D specs 180-210 ft/lbs for both OEM & S&S forged flywheels. * Greater torque will ...

DAYTONA JAPAN

$944.99

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...