Wiseco 4864M08500 Forged Piston Kit CR Suzuki Hayabusa - 85mm 13.5 1 GSX1300R

The Wiseco 4864M08500 is a high-performance forged piston kit designed for the Suzuki GSX1300R Hayabusa (1999–2006). Built to an aggressive 13.5:1 compression ratio with an 85mm bore, this kit is engineered for riders demanding maximum power output from their Hayabusa engine.

Key Features:

• Forged from high-silicon, low-expansion aluminum alloy for superior strength, reduced weight, and improved heat transfer compared to cast pistons
• 85mm bore diameter — an oversize piston requiring cylinder boring or sleeving
• 13.5:1 compression ratio for maximum high-performance and racing applications
• Optimized piston skirt design for improved horsepower and torque delivery
• Engineered, forged, and machined in the USA at Wiseco's Mentor, Ohio facility
• Kit includes: piston, rings, wrist pin, and circlips — everything needed for a complete rebuild
• Built to tight tolerances for the ultimate combination of performance and longevity

Important Installation Note: This is an oversize piston. Cylinder boring or sleeving is required before installation. Always verify piston-to-wall clearance per Wiseco's specification card prior to assembly.

Wiseco has been a leader in forged piston technology for over 80 years, supplying both competitive racers and performance enthusiasts with precision-engineered components built to win.