Wiseco PK1277 48mm 9.7:1 Top-End Piston Kit with Gaskets for Honda XR80

The Wiseco PK1277 is a complete top-end piston and gasket kit engineered specifically for the Honda XR80 and XR80R. Featuring a 48.00mm bore and 9.7:1 compression ratio, this kit delivers everything needed to restore or upgrade your engine's top end in a single package.

Wiseco is the only aftermarket piston manufacturer in the United States to produce pistons exclusively through the forging process. Using dedicated forgings from aerospace-grade aluminum alloy, each piston achieves a superior strength-to-weight ratio compared to cast alternatives. Forged pistons feature condensed, aligned grain structure that resists impact and fatigue — critical for high-performance and racing applications.

The 4-stroke piston features a race-ready dome finish with smooth edges for improved combustion flow, and Wiseco's Armor Glide skirt coating reduces friction and noise while contributing to increased horsepower. Each piston is precision-designed with the correct installed clearance to maximize power output, minimize wear, and maintain the best possible seal at operating temperature.

Kit Includes:

• Forged piston — dedicated aerospace alloy forging, 48.00mm bore, 9.7:1 compression ratio (Wiseco P/N 4665M)
• High-performance piston ring set — for extended service life and sustained power
• High-quality alloy wrist pin — precision-machined for consistent, durable performance
• Wrist pin circlips
• Top-end gasket kit — premium materials exceeding OEM sealing standards

Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, the PK1277 is a proven choice for trail riders and racers looking to rebuild or refresh their Honda XR80 engine with confidence.