Wiseco Pistons PK1186 Top End Piston Kit Yamaha - 52.5mm 1993-2001 YZ80

The Wiseco PK1186 is a complete top end kit designed for the 1993–2001 Yamaha YZ80, featuring a 52.5mm (767M) forged piston built to exceed OEM standards. Wiseco's forged pistons are a go-to choice for motocross and off-road racers demanding superior durability and consistent power output from their two-stroke engines.

This kit is engineered using aerospace-grade aluminum alloy, delivering an exceptional strength-to-weight ratio that holds up under the high RPM and thermal stress demands of two-stroke competition racing. Each piston is CNC machined with an optimal cam shape and profile to maximize peak horsepower while extending service life.

Kit Includes:

• Forged 52.5mm piston — dedicated forging with race-proven design geometry
• Top end gasket kit — premium materials for sealing performance that meets or exceeds OEM specifications
• High-performance ring set — engineered for extended service life and sustained power delivery
• Top end needle bearing — precision machined for reduced friction and long-term reliability
• High-quality alloy wrist pin — consistently true and durable for dependable operation

Wiseco pistons are trusted by top-level race teams across all forms of motorcycle competition. The PK1186 provides a straightforward upgrade or replacement solution for the Yamaha YZ80, restoring compression and performance to like-new or better-than-stock levels.