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Upgrade your engine's performance with the HASTINGS 2M6127 piston ring set, designed specifically for 80" Big Twin motorcycles. This comprehensive set includes top compression rings, second compression rings, and oil control rings, providing all essential components for optimal piston operation. The top compression rings feature a barrel face that enhances heat transfer between the piston and cylinder wall, ensuring efficient thermal management during high-performance operation. These rings effectively control combustion gases, allowing the piston to transfer energy to the crankshaft smoothly and reliably. The second compression rings are designed with a reverse torsional taper face, promoting side sealing that prevents oil from being forced under or behind the rings. This improves oil economy and reduces blow-by, contributing to cleaner emissions and better engine longevity. The oil control rings are a three-piece flex vent design that offers excellent conformability to the bore, thanks to a small cross-sectional area and a robust steel rail construction. This design ensures uniform pressure distribution across the piston, providing effective oil control and minimizing oil consumption. Made in the USA, these rings are engineered for durability and precision, with special attention required to the top ring end gap due to the thermal conductivity and design of KB pistons. Installation instructions furnished with the piston should be followed carefully for optimal results. This set includes enough rings for two pistons, with two rings per groove—except for the rails, which use two rings per one expander ring—ensuring a complete and reliable rebuild or upgrade for your Big Twin engine.
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