Wiseco 772M06600 Forged Piston Kit Oversize Bore - 1.5mm 66mm 2-Stroke

The Wiseco 772M06600 is a high-performance forged piston kit designed for the Yamaha RT180 (1990–1998). This is a +1.5mm oversize piston with a 66mm bore diameter (Wiseco code 2598CD), purpose-built for 2-stroke engine rebuilds requiring reliable, race-proven components.

Wiseco's Classic Forged 2-stroke pistons are engineered, forged, and machined in the USA at their facility in Mentor, OH. Starting with aerospace-grade aluminum, Wiseco's forging process compresses the material's molecules, increasing aluminum density and aligning grain flow for superior resistance to impact and fatigue compared to cast alternatives.

Key Features:

• +1.5mm oversize — 66mm bore diameter (2598CD)
• Forged from high-silicon, low-expansion aluminum alloy for superior strength and reduced weight
• Dedicated forging design optimizes strength-to-weight ratio for the specific 2-stroke powersports engine
• Improved tensile strength over cast pistons for extended service life
• Diamond-turned CNC finish ensures consistent sizing with no variance
• Kit includes piston, high-quality ring(s), wrist pin, and circlips

Important: This oversize piston requires professional cylinder boring or sleeving prior to installation. Wrist pin: 16mm diameter.