Crankcases & Parts

Harley Crankcases & Parts — Foundations for Power & Reliability

Welcome to our Harley Crankcases & Parts collection — your go-to destination for crankcases, engine cases, case components and internal parts crafted for Harley-Davidson motorcycles. Whether you’re rebuilding, upgrading, or building a custom engine from the ground up, having a high-quality crankcase and matching internals is essential for strength, longevity, and performance.

Why Crankcases & Parts Are Critical for Your Harley

The crankcase is the backbone of your engine — housing crankshaft, bearings, cylinders, camshafts, and ensuring proper alignment and sealing. Using quality crankcase parts ensures:

• Structural integrity — handling torque, displacement increases, and high RPMs without warping or failure

• Proper sealing — preventing oil leaks, maintaining oil pressure, and protecting internal components

• Precision alignment — ensuring crankshaft, cams, and transmission align correctly for smooth operation

• Compatibility with performance upgrades — big bores, stroker kits, high-compression builds, and more

Cheap or worn crankcases can lead to misalignment, leaks, excessive wear, or catastrophic failure — especially on modified or high-output engines.

Are aftermarket crankcases worth it?
Yes — for custom, high-output or big-bore builds, aftermarket crankcases offer strength, precision, and longevity that stock cases may not provide when under stress.

Ready to Build or Rebuild Your Engine’s Core?

Explore our full selection of Harley crankcases, rebuild kits, internal parts and engine-core components — whether you’re restoring a stock engine, rebuilding a high-mile motor, or building a high-performance custom from the ground up. With the right foundation, your engine will deliver power, reliability, and long-term durability ride after ride.