Wiseco PK1569 Pro-Lite Forged Piston Kit 69mm +1.00mm Overbore with Gaskets

The Wiseco PK1569 is a complete Pro-Lite forged piston kit designed for top-end rebuilds and overbore applications on 1995–1998 Yamaha YZ250 and WR250 two-stroke engines. This kit features a 69mm (+1.00mm overbore) bore diameter using Wiseco's 677 series forging, delivering improved durability and performance over stock cast pistons.

About the Wiseco Pro-Lite Series:

The Pro-Lite line represents Wiseco's foundation in two-stroke piston engineering — the result of decades of motorsport experience. These forged pistons are precision-manufactured to provide consistent power output, improved heat dissipation, and long-lasting reliability for all-purpose two-stroke riding ranging from trail use to competition.

Kit Includes:

• Forged Pro-Lite piston — 69mm (+1.00mm overbore), 677 series forging
• Piston ring set — pre-gapped for proper cylinder sealing
• Wrist pin (piston pin) — precision-ground for exact fit
• Circlips (retainer clips) — secure wrist pin retention
• Top-end gasket set — overbore head gasket included for complete rebuild

Everything needed to complete a top-end overhaul or overbore is included in a single kit, making the PK1569 a convenient, reliable choice for engine rebuilders and performance enthusiasts working on 1995–1998 Yamaha YZ250 and WR250 two-stroke powerplants.