Wiseco PK1961 Powersports Piston Kit with Rings, Wrist Pin & Circlips

The Wiseco PK1961 is a complete powersports piston kit engineered for high-performance engine rebuilds. As part of Wiseco's PK-series top-end kits, this kit includes everything needed to restore or upgrade your engine's top end, including a precision-forged piston, high-performance ring set, alloy wrist pin, and circlips.

Key Features:

• Forged aluminum construction — each piston is forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer
• CNC diamond-turned finish — machined on computer-controlled turning centers for a precision finish and consistent sizing with no variation
• Dedicated forgings — optimized strength-to-weight ratio through application-specific forging geometry
• High-performance ring set included — designed for extended engine life and sustained power output
• Alloy wrist pin included — lightweight and consistently true for reliable piston alignment and smooth motion
• Circlips included — secure the wrist pin in place for a complete, ready-to-install kit
• Compatible with all cylinder bore types — fits cast iron, chrome, Nikasil, and boron composite cylinder compositions
• Race-proven design — developed from decades of experience across Supercross, Motocross, GNCC, and Superbike competition

Wiseco's PK-series kits are manufactured at the company's state-of-the-art facility in Mentor, Ohio, and are trusted by both competitive racers and recreational riders. The PK1961 delivers the combination of performance and durability that Wiseco has built its reputation on across more than 80 years in powersports.