Wiseco Pistons PK1036 High-Compression Piston Kit 85mm 11:1 CR for Honda XR/TRX400EX/TRX400X

The Wiseco PK1036 piston kit delivers high-performance engine components engineered for Honda XR400R, TRX400EX, and TRX400X applications. This complete top-end kit features an 85.00mm bore diameter piston with an 11.0:1 compression ratio, designed to increase horsepower and throttle response while maintaining reliable operation.

Kit Includes:

• Forged aluminum piston with 85.00mm bore
• Piston rings and wrist pin
• Circlips for pin retention
• Top-end gasket kit for complete installation

Key Features:

• In-house forged construction for superior strength and durability
• 11.0:1 compression ratio optimized for performance gains
• Condensed grain structure aligned to part features for maximum impact resistance
• Skirt coating reduces friction and enhances wear resistance
• Optimized strength-to-weight ratio for reduced reciprocating mass
• Designed and manufactured in the USA with rigorous quality control

Wiseco forgings are engineered to withstand extreme racing conditions and high-performance applications where cast pistons would fail. The forging process creates superior material properties compared to casting, with enhanced resistance to fatigue and impact loads. Each piston is designed through extensive dyno testing and development to ensure maximum performance and reliability.