Eastern H-4250-010 3-5/16 Inch Side Valve Piston Ring Set For Harley UL Oversize

Designed for a 3-5/16 inch bore with.010 oversize, the Eastern H-4250-010 is a two-piston, side-valve piston ring set built for Harley-Davidson UL engines. It uses a one-piece oil ring and provides compression rings sized at 1/16 inch and oil rings sized at 3/16 inch.

• Bore: 3-5/16 in
• Oversize:.010 in
• Compression rings: 1/16 in
• Oil rings: 3/16 in
• Pistons: 2
• Oil ring design: one-piece
• Made in: Japan
• Fitment: Harley-Davidson UL (1937–1948)

Manufactured in Japan to tight tolerances, this ring set is intended for Harley UL models produced from 1937 through 1948. The rings are engineered to form a secure seal, reduce blow-by, and maintain compression, helping improve engine efficiency and power during restoration or rebuild projects.

For builders restoring or maintaining vintage Harleys, this ring set provides a precise, purpose-built solution aligned with original specifications and designed to support reliable operation on the road.

Cast piston ring set is for a 3-5/16 inch bore and is.010 oversize. Features compression rings with a size of 1/16 inch and oil rings with a size of 3/16 inch. Set is for 2 pistons with a one piece oil ring.

Upgrade your vintage Harley Davidson UL engine with the Eastern H-4250-010 piston ring set, designed for a 3-5/16 inch bore and featuring a.010 inch oversize for optimal performance. This high-quality set is crafted in Japan, ensuring precision and reliability for your restoration or rebuild project. The set includes compression rings with a 1/16 inch size and oil rings with a 3/16 inch size, specifically engineered for two pistons with a one-piece oil ring. These rings provide a secure seal, reducing blow-by and maintaining compression to enhance engine efficiency and power. Designed to fit Harley Davidson UL models from 1937 to 1946, this piston ring set is essential for maintaining the original performance standards of your vintage motorcycle. The durable construction and precise sizing make it an excellent choice for restoring your classic motorcycle to its original condition or improving its performance. Proper installation of these rings can significantly extend engine longevity and ensure smooth operation on the road. Whether you're a restoration enthusiast or a professional mechanic, this piston ring set offers a reliable solution for your Harley Davidson UL engine rebuilds.

Features:

• Designed for a 3-5/16 inch bore with.010 inch oversize for precise fit and performance

• Includes compression rings: 1/16 inch for effective sealing

• Includes oil rings: 3/16 inch for proper lubrication and oil control

• Set fits two pistons with a one-piece oil ring for efficient oil management

• Manufactured in Japan with high-quality standards for durability and reliability

Fitment:
Harley Davidson UL 1937
Harley Davidson UL 1938
Harley Davidson UL 1939
Harley Davidson UL 1940
Harley Davidson UL 1941
Harley Davidson UL 1942
Harley Davidson UL 1943
Harley Davidson UL 1944
Harley Davidson UL 1945
Harley Davidson UL 1946
Harley Davidson UL 1947
Harley Davidson UL 1948