S&S Cycle Engine

S&S Cycle: Over Six Decades of V-Twin Performance

Few names carry as much weight in the world of American V-Twin motorcycles as S&S Cycle. Founded in 1958 in Viola, Wisconsin, the company was born out of a simple but powerful idea: if the factory parts won't make your Harley-Davidson go faster, build better ones yourself. That philosophy has driven S&S Cycle to become one of the most respected manufacturers of high-performance motorcycle engine components in the powersports industry.

For more than 65 years, S&S has served everyone from weekend riders looking for a modest power bump to professional builders crafting ground-up custom motorcycles. Their engineering team focuses relentlessly on real-world performance gains, producing parts that are dyno-tested and purpose-built for the demands of Big Twin and Sportster platforms. Every component in the S&S catalog is designed to work together, meaning riders can mix and match parts from the same ecosystem with confidence.

The Engine Is Where It All Begins

The heart of S&S Cycle's catalog is its engine internals lineup. Their Engine Camshaft Kits are among the most sought-after upgrades in the Harley-Davidson community, offered in both chain-drive and gear-drive configurations across a wide range of grind profiles — from mild street cams to aggressive performance grinds. Whether you're building a touring bike that needs strong low-end torque or a stripped-down custom that lives for high-RPM power, S&S has a cam kit engineered for that exact purpose.

Reliable oiling is essential to any high-performance build, and S&S addresses this with their industry-leading Engine Oil Pumps. Precision-machined from billet aluminum and featuring independent scavenge sections, S&S oil pumps are a staple upgrade in cam chest rebuilds and complete engine builds alike. Paired with their billet cam plates, they represent one of the most complete oiling system solutions available for V-Twin platforms.

No less critical are S&S Engine Valve Lifters — also known as tappets. These components are the link between the camshaft and the rest of the valvetrain, and S&S engineers them with tight tolerances and premium materials to ensure consistent valve actuation even under sustained high-load riding conditions. They're a popular choice during any cam swap or top-end rebuild.

Legendary Carburetors for Classic and Custom Builds

Ask any veteran Harley builder about S&S, and the conversation will almost certainly turn to carburetors. The S&S Super E and Super G carburetors have been a benchmark in the industry for decades, prized for their tunability, fuel delivery consistency, and straightforward maintenance. The full range of Carburetors & Accessories from S&S includes everything from complete carburetor units to rebuild kits, jets, needles, and mounting hardware — making it easy to keep a classic carbureted setup running at its best or to build a fresh performance combination from scratch.

Made in America, Built for the Road

S&S Cycle remains a privately held, American-made brand with deep roots in the motorsports community. Their commitment to domestic manufacturing and rigorous quality control means that every camshaft kit, oil pump, lifter set, and carburetor that leaves Viola, Wisconsin has been held to the same standards that have defined the brand for generations. For riders who demand the best from their V-Twin, S&S Cycle is the benchmark.