Wiseco Pistons PK1060 ATV Piston Kit Compression Yamaha - 100mm 11 1 YFM660

The Wiseco PK1060 Performance Piston Kit delivers high-compression power for Yamaha YFM660 ATV applications. This complete top-end kit features a 100.00mm bore diameter piston with an 11.0:1 compression ratio, designed to maximize performance and durability in demanding off-road conditions.

Key Features:

• 100.00mm bore diameter with 11.0:1 compression ratio for increased power output
• Forged construction with condensed grain structure for superior strength and impact resistance
• Complete kit includes piston, rings, wrist pin, circlips, and top-end gasket set
• ArmorGlide skirt coating reduces friction and wear during break-in and operation
• Precision-machined ring grooves and optimized piston design for reliable sealing
• Made in USA with in-house forging and manufacturing quality control

Wiseco's forged pistons offer significant advantages over cast alternatives, with aligned grain structure that provides higher mechanical properties and resistance to fatigue. Each piston is engineered to optimize the strength-to-weight ratio, making this kit ideal for performance rebuilds and high-stress riding applications on Yamaha YFM660 Grizzly and Raptor models.