Description

Piston Kit – 66.00 mm – Yamaha

The WSM Piston Kit (Part Number 50-530PK) is engineered to meet or exceed original equipment manufacturer (OEM) standards for Yamaha engines. Featuring a durable construction, this piston kit includes components designed for high performance and long-lasting reliability. The skirts are coated with a nonabrasive, expansion-retarding MoS2 (Molybdenum Disulfide) coating that significantly reduces heat and friction, resulting in improved power output and extended engine life. The MoS2 coating effectively draws heat through piston walls and directs it out the bottom, enhancing thermal management during operation. Specially hardened tops provide added strength to the ring grooves, ensuring durability under demanding conditions. An improved E-clip design simplifies installation and maintenance, making this kit a reliable choice for engine rebuilds or upgrades. This piston kit is suitable for Yamaha models requiring a 66.00 mm piston diameter and is sold as a single unit per cylinder, ensuring precise fit and performance. Whether you’re restoring a vintage Yamaha or upgrading a performance engine, the WSM Piston Kit offers quality construction and innovative features to meet your needs.

Features:

• OEM-grade construction for reliable performance

• MoS2 coating on skirts reduces heat and friction for enhanced power and longevity

• MoS2 coating draws heat through piston walls and out the bottom for improved thermal management

• Specially hardened tops add strength to ring grooves for durability

• Improved E-clip design for easier installation and maintenance