Wiseco Pistons 4988M07700 Forged Piston Kit Compression - 4-Stroke 77mm 12.5 1

The Wiseco 4988M07700 is a high-performance, 4-stroke forged piston kit featuring a 77.00mm bore diameter and a 12.5:1 compression ratio, engineered for demanding powersports applications. Built using aerospace-grade aluminum alloy and Wiseco's dedicated forging process, this piston delivers an optimized strength-to-weight ratio that outperforms standard cast alternatives.

Key Features:

• 77.00mm bore diameter with 12.5:1 compression ratio for enhanced performance
• Forged from aerospace-grade aluminum alloy for superior tensile strength and durability
• Dedicated forging design optimizes the strength-to-weight ratio for maximum engine efficiency
• Improved piston skirt design promotes maximum horsepower and torque output
• Precision-crafted and forged in the USA using state-of-the-art CNC equipment
• Kit includes piston, high-performance rings, wrist pin, and circlips — everything needed for a complete repair
• Race-proven design trusted by top teams in Supercross, Motocross, GNCC, and Superbike competition

Compared to cast pistons, Wiseco's forged construction features condensed, aligned grain structure that delivers higher mechanical properties and greater resistance to impact and fatigue. Standard bore (STD) fitment — note that oversize pistons may require cylinder sleeving.