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Upgrade your motorcycle's engine performance with the HASTINGS piston rings designed specifically for 74-inch Big Twin V-twin engines. This comprehensive set includes top compression rings, second compression rings, and oil control rings, providing a complete solution for optimal engine operation. The top compression rings feature a barrel face that enhances heat transfer between the piston and cylinder wall, helping to maintain proper operating temperatures and improve overall efficiency. These rings also effectively control the combustion chamber gases, ensuring efficient energy transfer from combustion to the crankshaft. The second compression rings are designed with a reverse torsional taper face that promotes side sealing, reducing oil consumption by preventing oil from leaking under and behind the ring. The reverse twist combined with the taper-machined ring face mirrors the bottom scraping edge of a positive twist torsional ring, ensuring a tight seal under various engine conditions. The oil control rings are three-piece flex vent types, which are engineered with small cross-sectional rails for better conformability to the bore. The three-piece design with four steel rails and two expanders provides consistent pressure, ensuring superior oil control and reducing oil consumption. Made in the USA, these rings are built with durability and precision in mind, compatible with the special thermal conductivity properties of KB pistons. It’s important to note that the top ring end gap must be set according to the instructions provided with the piston to ensure proper fit and performance. This kit includes enough rings for two pistons, with two rings per groove—except for the rails, which are supplied with two rail rings per one expander ring—making it a reliable choice for rebuilds or upgrades. Designed for easy installation and long-lasting performance, these Hastings piston rings will help your motorcycle run smoothly and efficiently for miles to come.
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