Hastings Replacement Piston Rings for 3.937" Bore

Elevate your engine's performance and longevity with the Hastings Replacement Piston Rings set. Engineered for optimal combustion and oil control, this comprehensive kit ensures your motorcycle runs at peak efficiency. Designed for a 3.937" bore, these piston rings are a direct replacement, providing superior sealing and heat transfer.

Description

The Hastings Replacement Piston Rings are meticulously engineered to restore and enhance your engine's internal dynamics. This premium set includes top compression rings, second compression rings, and oil control rings, all crafted for specific functions to maximize power and efficiency. The top compression rings feature a Barrel Face design and are coated using an advanced PVD (Physical Vapor Deposition) process. This coating significantly aids in heat transfer between the piston and cylinder wall, crucial for engine cooling and longevity. Furthermore, they expertly control combustion chamber gases, allowing the piston to efficiently transfer the energy of expanding combustion gases to the crankshaft, boosting overall power output.

For superior oil management, the second compression rings are of the Napier type, featuring a reverse twist and a taper-machined ring face. This innovative design duplicates the OD bottom side scraping edge of a positive twist torsional ring, promoting excellent side sealing. This action effectively prevents oil from being forced under and behind the ring, leading to significantly better oil economy and reduced consumption. The oil control rings are a Three Piece Flex Vent design, which allows the rails to be manufactured with a small cross-sectional area for enhanced conformability to the cylinder bore. This three-piece construction, utilizing four steel rails and two expanders, ensures uniform pressure for positive oil control, minimizing blow-by and maintaining engine cleanliness. Proudly made in the USA, this piston ring set is a testament to quality and precision engineering, designed for standard piston sizes and a 107" displacement.

Features & Highlights

• Optimized Combustion Control: Barrel Face top compression rings with PVD coating efficiently transfer heat and seal combustion gases, maximizing power delivery to the crankshaft.
• Superior Oil Economy: Napier second compression rings feature a reverse twist and taper-machined face, promoting side sealing to prevent oil bypass and reduce consumption.
• Exceptional Oil Control: Three Piece Flex Vent oil control rings offer uniform pressure and excellent conformability for precise oil scraping and reduced blow-by.
• Enhanced Heat Transfer: PVD-coated rings facilitate superior heat dissipation from the piston to the cylinder wall, improving engine durability and lifespan.
• Precision Engineered Fit: Designed for a 3.937" bore and 107" displacement, ensuring a perfect fit and reliable performance for standard piston sizes.
• Comprehensive Set: Includes all necessary rings for two pistons (top, second, and oil control rings), providing a complete solution for engine overhaul.
• Proudly Made in the USA: Guarantees high-quality manufacturing and materials for long-lasting reliability and performance you can trust.

Technical Specifications

• Type: Replacement
• Units: Set (for two pistons)
• Bore Size: 3.937"
• Piston Size: Standard
• Displacement: 107"
• Product Name: Piston Ring Set
• Vendor Part Number: WG2197600 | 2C5231

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