Wiseco Pistons PK1240 High-Performance Piston - Kit 78mm 13.5 1 CRF250R/CRF250X

The Wiseco PK1240 is a complete high-compression piston kit engineered for 2004-2007 Honda CRF250R and 2004-2009 CRF250X motorcycles. This premium kit features a 78.00mm bore diameter with an aggressive 13.5:1 compression ratio, delivering maximum power output for competitive racing and demanding off-road applications.

Key Features:

• 78.00mm bore diameter with 13.5:1 compression ratio for increased power
• 100% forged in-house construction for superior strength and durability
• Complete top-end gasket kit included for convenient installation
• Aligned grain structure provides exceptional impact and fatigue resistance
• Optimized strength-to-weight ratio for maximum performance
• Advanced skirt coating reduces friction and wear
• Designed and tested using in-house dyno facilities

Wiseco forged pistons are manufactured entirely in the USA with complete control over every aspect of production, from raw materials to finished components. Unlike brittle cast pistons that fail catastrophically under stress, Wiseco forgings feature condensed grain structure aligned to the part geometry, creating superior mechanical properties that withstand extreme racing conditions. Each piston is precisely engineered to deliver the toughness and reliability required for high-performance motorsport applications.