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Upgrade your engine's performance with the HASTINGS Piston Rings designed specifically for 1340 cc Big Twin motorcycles. These precision-engineered rings include top compression rings, second compression rings, and oil control rings, ensuring optimal sealing and efficiency. The Top Compression Rings feature a barrel face and cast coating, which facilitates effective heat transfer between the piston and cylinder wall, reducing the risk of overheating and maintaining consistent engine temperatures. They are engineered to control combustion chamber gases, allowing the piston to transfer the energy generated by expanding gases to the crankshaft efficiently. The second compression rings utilize a reverse torsional taper face, promoting side sealing that prevents oil from leaking under or behind the rings, leading to improved oil economy and reduced consumption. This reverse twist design, combined with a taper-machined ring face, mimics the scraping edge of a positive twist torsional ring, enhancing overall sealing performance. The oil control rings are a three-piece flex vent design, crafted for superior conformability to the bore with a small cross-sectional area. This structure ensures uniform pressure distribution through four steel rails and two expanders, providing reliable oil control to minimize oil consumption and prevent fouling. Made in the USA, these rings come with enough components to service two pistons, with two rings per groove—except for the rails, which include two rail rings per one expander ring. Whether you're rebuilding or upgrading, these high-quality piston rings are designed to deliver durability, efficiency, and optimal engine performance for your Harley-Davidson Big Twin engine.
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