Wiseco CK104 Top End Piston Kit CR Suzuki Hayabusa - 81mm 13 1 GSX1300R 1999-2006

The Wiseco CK104 is a complete top end piston kit engineered for the Suzuki GSX1300R Hayabusa (1999–2006). Built to a 13:1 compression ratio with a standard 81.00mm bore, this forged kit is purpose-built for high-performance street and race applications on the legendary 1,298cc inline-four Hayabusa engine.

Each CK104 kit is engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, using dedicated forgings from aerospace-grade aluminum alloy for an optimized strength-to-weight ratio. Wiseco's forged construction delivers superior tensile strength compared to OEM cast pistons, making this kit an ideal upgrade for riders pushing the Hayabusa's limits on the street or strip.

Key Features:

• Complete top end kit — includes four forged pistons, high-performance ring sets, alloy wrist pins, and circlips
• 81.00mm standard bore with 13:1 compression ratio for maximum power output
• Race-ready dome finish with smooth edges for improved combustion flow and efficiency
• ArmorGlide skirt coating reduces friction and noise while contributing to increased horsepower and improved scuff resistance
• Horizontal slot-pin oiling reduces friction and provides scuff resistance, along with a pressure seal groove for maximum ring seal
• Dedicated aerospace alloy forgings for superior strength-to-weight ratio and extended service life
• Race-proven design trusted by top teams in Superbike, Motocross, GNCC, and Supercross competition
• Engineered, forged, and precision-machined in the USA

The Wiseco CK104 gives Hayabusa builders everything needed to complete a top end rebuild with confidence, combining race-validated engineering with durable materials that go well beyond OEM performance standards.