Wiseco Pistons PK1071 95mm Piston Kit for Yamaha YFZ450 ATV

The Wiseco PK1071 performance piston kit delivers race-proven reliability for 2004-2009 Yamaha YFZ450 ATVs. Featuring a 95.00mm bore diameter and 12.0:1 compression ratio, this complete top-end kit includes a forged piston (part number 4865M) and all necessary gaskets for a complete rebuild.

Key Features:

• 95.00mm bore diameter with 12.0:1 compression ratio for increased power
• Premium forged aluminum construction for superior strength and durability
• Includes complete top-end gasket kit for convenient installation
• Optimized skirt coating reduces friction and wear
• Designed specifically for 2004-2009 Yamaha YFZ450 applications
• Engineered grain structure aligned to piston features for maximum impact resistance

Why Forged Pistons Matter:

Wiseco's in-house forging process creates pistons with condensed, aligned grain structure that delivers significantly higher mechanical properties than cast alternatives. This results in exceptional resistance to impact, fatigue, and the extreme conditions of high-performance ATV racing. Each piston is precision-machined to optimize the strength-to-weight ratio while maintaining the tight tolerances required for maximum performance and reliability.

Backed by decades of racing experience and rigorous dyno testing, Wiseco pistons are trusted by professional riders and enthusiasts worldwide. This complete kit provides everything needed for a quality top-end rebuild on your YFZ450.