Wiseco PK1847 77mm 14.2:1 Forged Piston Kit with Top-End Gasket Kit for 2010 Kawasaki KX250F

The Wiseco PK1847 is a high-performance forged piston kit designed for the 2010 Kawasaki KX250F, featuring a 77.00mm bore and an aggressive 14.2:1 compression ratio. This kit includes Wiseco's forged piston (Wiseco forging code 40010M) along with a top-end gasket kit, giving you everything needed for a complete top-end rebuild.

Key Features:

• 77.00mm bore diameter with 14.2:1 compression ratio for maximum power output
• USA-forged piston — forged entirely in-house at Wiseco's domestic facility using proprietary forge tooling
• Condensed, aligned grain structure delivers superior mechanical properties, impact resistance, and fatigue resistance compared to cast pistons
• Optimized strength-to-weight ratio for competitive motocross performance
• Skirt coating applied in-house for reduced friction and extended piston life
• Includes top-end gasket kit for a complete, ready-to-install package
• Developed and validated through in-house dyno testing using state-of-the-art research and development

Unlike cast pistons, which have no defined grain structure and are prone to catastrophic failure when material yield strength is exceeded, Wiseco forged pistons feature a condensed grain flow aligned to the shape of the part. This results in a tougher, more durable piston that can withstand the extreme mechanical and thermal stresses of high-performance motocross racing.

Wiseco controls every stage of production — from raw bar stock through forging, machining, coating, and distribution — ensuring consistent quality and precise fitment. The PK1847 is the trusted choice for riders who demand reliability and power from their 2010 KX250F.