Engine

Harley Motorcycle Engines — Engines, Kits & High-Performance Power Packages

Welcome to our Harley Motorcycle Engine collection — your destination for complete engines, engine rebuild kits, performance power packages, and essential engine components designed for Harley-Davidson motorcycles. Whether you’re building a custom bike, restoring a classic, or upgrading power on a Harley Bagger, M8 Softail, Dyna or Sportster, the right engine or engine components can transform your ride’s performance, reliability, and ride feel.

Why Investing in Harley Engine Components Matters

Upgrading or replacing your Harley’s engine isn’t just about more power — it’s about reliability, smooth operation, durability, and customizing performance to match your riding style. A well-assembled engine or rebuild kit helps ensure:

• Consistent power delivery and smooth torque

• Increased reliability and longevity, even under heavy loads or long rides

• Compatibility with performance upgrades like high-flow intake, exhaust, cams, or fuel systems

• Reduced risk of engine wear, failures, or overheating

• The ability to build a custom bike tailored to your riding preferences

Whether you need a fresh stock replacement or a high-performance build, selecting the right engine solution is vital.

What You’ll Find in Our Engine & Performance Packages

Our Harley Motorcycle Engine category includes a comprehensive selection of engine solutions and components:

• Complete Replacement Engines — brand-new engines compatible with major Harley models

• Engine Rebuild Kits & Long-Block Assemblies — for restoring or upgrading older engines with fresh internals

• Performance Engine Kits & Big Bore Upgrades — for riders chasing higher torque, horsepower, or custom build power levels

• Engine Internals & Component Kits — pistons, rods, crankshafts, bearings, gaskets, seals, and more for rebuild or custom builds

• Accessory Components — engine covers, gaskets, bolts, sensors, and mounting hardware to complete your build or restoration

• Upgrade-Ready Engines for Custom Builds — for choppers, baggers, café-racers, or custom frame projects

We carry engine options for a wide range of Harley-Davidson platforms: Touring, Softail, Dyna, Sportster, custom choppers, and performance builds.

Choosing the Right Engine or Engine Kit for Your Harley

1. Engine Type & Compatibility

Make sure the engine or kit matches your Harley’s frame, transmission setup, mounting locations, and model year. Fitment is critical for reliability and performance.

2. Usage & Riding Style

• Daily riders / street use: Balanced rebuild kits or stock replacement engines emphasize reliability and longevity.

• Performance builds / heavy load: Big-bore or performance-oriented kits with robust internals are ideal for power, torque, and durability under stress.

• Custom builds / restomods: Engines intended for customization or non-stock configurations should offer adaptability, upgrade potential, and compatibility with aftermarket components.

3. Required Supporting Upgrades

Adding a high-performance engine often requires other upgrades — intake, exhaust, fuel system tuning — to fully realize potential. Plan accordingly to optimize performance, reliability, and tuning.

4. Quality of Components & Assembly

Choose engines and kits built with high-quality materials, precise machining, and reliable internals. Quality assembly ensures smooth operation, lower maintenance, and stronger longevity.

Benefits of Upgrading or Replacing Your Engine

• Renewed performance for worn or high-mile engines

• Ability to support performance mods — cams, intake, exhaust, fuel upgrades

• Longer engine life and improved reliability

• Improved ride experience — smoother power delivery, better throttle response, more torque

• Flexibility for custom builds, choppers, or non-stock engine/frame combinations

Frequently Asked Questions

Will a performance engine affect fuel economy or maintenance needs?
Potentially. Higher power engines usually require better fuel delivery and tuning, and may need more frequent maintenance. But when matched properly (intake, exhaust, fuel), they deliver significant performance gains.

Is a big-bore or performance engine worth it for street riding?
Yes — if you want stronger torque, better throttle response, and the ability to support upgrades. For heavy loads or long rides, an engine upgrade can improve overall responsiveness and ride quality.

What supporting parts should I upgrade when installing a new engine?
Consider fuel delivery (fuel pumps/lines), air intake, exhaust, engine mounts, cooling (if applicable), and tuning Equipment. Matching components ensures longevity and performance.

Ready to Build or Upgrade Your Harley Engine?

Browse our full lineup of Harley engines, rebuild kits, performance power packages and engine components to find the right match for your bike and build goals. Whether you’re restoring a classic, refreshing a high-mile engine, or building a high-performance custom — we have the quality and variety you need.