Wiseco PK1582 2003 Honda CR125 GP Series 56mm Forged Piston Kit

The Wiseco PK1582 is a GP Series forged piston kit designed specifically for the 2003 Honda CR125 two-stroke motocross engine. Machined to a 56mm bore diameter (762M), this kit provides a reliable overbore solution for top-end rebuilds with components engineered to Wiseco's exacting tolerances.

Wiseco's GP Series pistons are forged from aerospace-grade aluminum alloy, offering superior strength and heat resistance compared to cast alternatives. The forging process results in a denser grain structure that withstands the high-compression, high-RPM demands of the CR125's two-stroke powerplant.

Kit Includes:

• Forged GP Series piston – 56mm bore (762M oversize)
• Piston ring set – precision-fit rings for optimal compression seal
• Wrist pin (piston pin) – hardened for durability under high-cycle stress
• Circlips (retainer clips) – secure wrist pin retention

Key Features:

• Forged aluminum construction for maximum strength-to-weight ratio
• GP Series design optimized for two-stroke performance and reliability
• Precision CNC machined to tight tolerances for proper fitment
• Engineered to meet or exceed OEM specifications for the 2003 Honda CR125
• 56mm bore diameter – ideal for cylinder overbore or honing to next oversize

The Wiseco PK1582 is a trusted choice for motocross riders and mechanics performing a top-end rebuild on the 2003 Honda CR125. Pairing this kit with a professional bore and hone to 56mm ensures maximum performance and longevity.