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The S&S Cycle Camshaft 561 (Part 33-5076) is engineered for optimal performance in 80"-96" Evolution Big Twin engines. Each camshaft undergoes rigorous testing on dynos, street, and track to ensure maximum durability and performance, giving you confidence in its quality. Designed specifically for engines with a compression ratio of 9.5:1 to 10.5:1, this camshaft delivers strong midrange power and smooth acceleration within the 3000-5500 rpm range, making it ideal for both street and highway riding.
Constructed to work seamlessly with hydraulic tappets, the S&S 561 camshaft requires high-lift springs for proper operation. It also needs spring spacing to be checked during installation. The product is made in the USA, adhering to strict quality standards. Proper installation requires the installer to verify coil bind, valve-to-valve clearance, valve-to-piston clearance, and cam lobe to case clearance to ensure optimal performance and engine longevity. This camshaft is a reliable upgrade for motorcycle enthusiasts seeking increased power and responsiveness from their Evolution Big Twin engine.
With hundreds of hours of development and testing, the S&S Cycle Camshaft 561 offers a balance of power, durability, and efficiency. It is designed for professional installation and ideal for riders looking to improve midrange torque and overall engine performance without sacrificing reliability. Whether you’re customizing your motorcycle for street riding or performance upgrades, this camshaft provides a high-quality solution backed by S&S's reputation for excellence in engine components.
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