Wiseco CK215 Forged Top End Piston Kit Bore CR - 4-Stroke 77mm 13.5 1

The Wiseco CK215 is a complete 4-stroke forged top end piston kit designed for the 2007–2008 Yamaha YZF-R1. Featuring a domed piston design with a high-compression 13.5:1 compression ratio and a standard 77.00 mm bore, this kit delivers the power and reliability demanded by performance street and track riders alike.

Wiseco's forged 4-stroke pistons are engineered and machined in Mentor, OH, USA, and built to the tightest tolerances for an optimal combination of performance and strength. The dedicated forgings used in the CK215 provide a superior strength-to-weight ratio, while the ArmorGlide skirt coating reduces friction and noise to contribute to increased horsepower and extended service life.

Kit Includes:

• Forged domed piston(s) — 77.00 mm bore, 13.5:1 compression ratio
• High-performance piston ring set
• Alloy wrist pin(s)
• Circlips
• Top end gasket kit

Key Features:

• Forged construction for improved tensile strength and optimized service life
• Dedicated forgings allow for superior strength-to-weight ratio vs. cast pistons
• ArmorGlide skirt coating minimizes friction and piston noise
• Race-ready domed finish with smooth edges for improved combustion flow
• Engineered, forged, and machined in the USA — Mentor, Ohio
• Built to tight tolerances for each specific engine application

Whether you're rebuilding for the street or prepping for the track, the Wiseco CK215 top end kit provides everything needed for a complete, professional-grade rebuild.