Wiseco 7700YC Piston Ring Set - 77mm | Fits Yamaha YZ250F, WR250F, KX250F, RM-Z250

Restore peak engine performance and ensure a superior ring seal with the Wiseco 7700YC Replacement Ring Set. Engineered for high-performance 4-stroke applications, these rings are designed to maintain precise geometry under extreme racing conditions, providing sustained power and durability.

Key Features:

• Precision Engineering: Alloy steel top ring is phosphate-coated and chrome-faced to reduce friction and maximize wear resistance.

• Superior Oil Control: Includes a 3-piece oil assembly featuring a stainless steel flex-vent spacer and chrome-faced rails.

• Race-Proven Reliability: Designed to deliver exceptional ring seal and sustained peak performance in demanding motorsports environments.

• Made in the USA: Manufactured to Wiseco’s rigorous quality standards.

⚠️ CRITICAL FITMENT NOTE: > * Wiseco Pistons ONLY: These rings are designed specifically for Wiseco pistons and will NOT fit OEM or other aftermarket brands.

• Verify Size: Please confirm your cylinder bore size (77.00mm) before ordering. Using the incorrect size will result in engine damage.

• Single Piston Kit: Each set includes rings for one (1) piston.

Fitment

This 77.00mm ring set is compatible with various 250cc 4-stroke dirt bikes utilizing Wiseco piston kits.

Specifications

• Part Number: 7700YC

• Bore Size: 77.00 mm

• Ring Type: YC Type (consists of Top Ring and Oil Ring)

• Material: Alloy Steel / Stainless Steel

• Engine Type: 4-Stroke