Primary Drive Systems

Harley Primary Drive Systems and Components

Upgrade or service the heart of your Harley Davidson’s drivetrain with premium Harley primary drive systems and components engineered for strength, precise fitment, and dependable performance. The primary drive connects your engine’s crank to the transmission, making it one of the most critical systems on your motorcycle. Whether you are performing a major rebuild, converting to a chain drive, or enhancing stock primary hardware for improved durability and torque transfer, this category offers the essential components and complete system solutions you need for both maintenance and performance builds.

Primary Sprockets and Cush Drive Components

Primary sprockets, main drive gears, and cush drive components are essential for tuning power delivery and ride feel. Upgraded sprockets in a variety of tooth counts allow riders to adjust acceleration and cruise RPM characteristics, while premium cush drive modules help absorb drivetrain shock loads, reduce vibration, and improve long-term reliability under heavy load or spirited riding conditions. An essential component upo grade is the Compensator Ramp for Harley M8 models. Options like the Star Racing, S&S Cycle or Evolution Industries offer a premium drivetrain upgrade designed to improve the durability and shock-absorbing performance of your Milwaukee-Eight primary system. Machined from high-strength  steel, this compensator ramp acts as a critical “shock absorber” for the crankshaft’s flywheel assembly, primary chain, adjuster, clutch basket, and transmission, helping to reduce stress on these components caused by low-speed abuse, part-throttle load swings, and aggressive acceleration. Upgrading to a billet compensator ramp enhances primary drive longevity and resistance to wear compared with stock ramps, providing added confidence for riders with performance builds or heavy touring loads. Engineered for direct fitment on 2017-2025 Harley M8 models, it supports improved drivetrain reliability while complementing other performance-oriented upgrades in your powertrain.

Engineered for Reliable Fitment

Each primary drive component in this category is engineered to match specific Harley Davidson model years and engine configurations, including Touring, Softail, Dyna, Sportster, Twin Cam, and M8 platforms. Accurate fitment is crucial to preserving optimal chain or belt alignment, maintaining proper tension, and preventing premature wear. Whether you are restoring a classic bike or building a high-output custom machine, selecting the correct primary drive parts ensures your drivetrain operates with peak performance and confidence.

Choose the Right Primary Drive System

Browse our selection of Harley primary drive systems to find complete kits, conversion options, replacement sprockets, and cush drive parts that meet your performance goals and project needs. Get Lowered Cycles delivers quality drivetrain components that support smooth power transfer, increased durability, and a more engaging ride experience.