Wiseco Pistons 4628M08800 High Compression Forged Piston Kit for Honda TRX400EX/TRX400X

The Wiseco 4628M08800 is a high-performance forged piston kit engineered for Honda TRX400EX (1999-2009) and TRX400X applications. This oversized piston features an 88.00mm bore (3.00mm over standard 85.00mm) and delivers an aggressive 11:1 compression ratio for increased power and throttle response.

Key Features:

• In-house forged construction for superior strength and durability compared to cast pistons
• Optimized grain structure aligned to part features for maximum impact and fatigue resistance
• Engineered strength-to-weight ratio for enhanced performance
• 88.00mm bore diameter (3.00mm oversize)
• 11:1 compression ratio for improved power output
• Complete piston kit includes rings, wrist pin, and circlips
• Precision-machined in the USA with American-made forge tooling

Wiseco's forging process creates a condensed grain structure that delivers higher mechanical properties than brittle cast pistons, making this kit ideal for high-performance and racing applications where reliability under extreme conditions is essential. The piston features Wiseco's proprietary skirt coating for reduced friction and extended cylinder life.