Description

Piston Kit – 66.50 mm – Yamaha

The WSM Piston Kit with a 66.50 mm bore is designed to deliver enhanced performance and durability for Yamaha engines. Constructed with high-quality materials, this piston kit meets or exceeds OEM standards to ensure reliable operation and longevity. The skirts feature a nonabrasive MoS2 (Molybdenum Disulfide) coating that reduces heat and friction, promoting smoother operation and preventing premature wear. This advanced coating also helps draw heat through piston walls and out the bottom, effectively managing engine temperatures during high-performance conditions. The specially hardened tops add strength to the ring grooves, providing improved wear resistance and maintaining optimal compression over time. An improved E-clip design simplifies installation and enhances security, making maintenance easier and more reliable. This piston kit is a perfect upgrade for Yamaha engines requiring a 66.50 mm bore, offering increased power, efficiency, and extended service life. Order one per cylinder to ensure optimal engine performance and longevity.

Features:

• High-quality construction that meets or exceeds OEM standards

• Nonabrasive MoS2 coating reduces heat and friction for improved power and durability

• MoS2 coating aids in heat dissipation through piston walls

• Specially hardened tops increase strength and wear resistance in ring grooves

• Improved E-clip design for easier installation and secure fit