Hastings Piston Rings for 3.750" +0.010" Bore

Ensure peak engine performance and longevity with the Hastings 3.750" +0.010" piston ring set. This premium replacement kit is engineered in the USA to deliver superior sealing, heat transfer, and oil control for your motorcycle's engine, providing everything needed for two pistons.

Description

Designed for specific 3.750" bore sizes with a +0.010" oversize, this Hastings piston ring set is a critical upgrade for maintaining optimal engine health and power output. Each set includes top compression rings, second compression rings, and oil control rings, all crafted with precision. The Barrel Face top compression rings are expertly designed to enhance heat transfer between the piston and cylinder wall, effectively controlling combustion chamber gases. This allows the piston to efficiently transfer the energy of expanding combustion gases directly to the crankshaft, maximizing power.

The Napier second compression rings feature a unique reverse twist and a taper-machined ring face, mimicking the scraping edge of a positive twist torsional ring. This innovative design promotes superior side sealing, preventing oil from being forced under and behind the ring, which significantly improves oil economy and reduces consumption. For meticulous oil management, the Three Piece Flex Vent oil control rings utilize a three-piece design with rails manufactured for a small cross-sectional area, ensuring better conformability to the cylinder bore. This construction, combined with uniform pressure from four steel rails and two expanders, guarantees positive oil control. Furthermore, the Moly coated piston rings provide enhanced durability and reduced friction, ensuring a long service life. Proudly made in the USA, this replacement piston ring set promises reliability and performance for discerning motorcycle enthusiasts and professionals.

Features & Highlights

• Barrel Face Top Compression Rings: Optimizes heat transfer and combustion gas control for efficient power delivery.
• Napier Second Compression Rings: Advanced reverse twist design enhances oil scraping and side sealing, leading to improved oil economy.
• Three Piece Flex Vent Oil Control Rings: Ensures superior bore conformity and uniform pressure for precise and positive oil control.
• Moly Coated Ring Material: Provides increased durability and reduced friction for extended component life and smooth operation.
• Complete Two-Piston Set: Includes all necessary rings for two pistons, simplifying your engine rebuild or maintenance.
• Made in the USA: Guarantees high-quality manufacturing and reliable performance.

Technical Specifications

• Style: Replacement
• Units: Set
• Product Name: Piston Ring Set
• Bore Size: 3.750"
• Bore Oversize: +0.010"
• Ring Material: Moly Coated
• Vendor Part Number: WG1254778 | 2M4805010

Important to Know

This set includes enough rings for two pistons. Each groove typically requires two rings, except for the oil control rails, which consist of two rail rings per one expander ring.