Wiseco 4856M08100 Forged Piston Kit CR Suzuki Hayabusa - 81mm 9.5 1 GSX1300R

The Wiseco 4856M08100 is a forged performance piston kit designed for the Suzuki GSX1300R Hayabusa (1999–2006). Built to a 9.5:1 compression ratio with an 81.00mm bore, this kit is an ideal choice for street riders and turbo builds seeking a reliable, lower-compression forged piston over the factory cast unit.

Wiseco forges each piston from a high-silicon, low-expansion aluminum alloy, delivering superior strength, reduced reciprocating weight, improved heat transfer, and extended service life compared to OEM cast pistons. The innovative forging geometry and precision-machined skirt profile are engineered to maximize horsepower and torque output across the powerband.

Key Features:

• Forged high-silicon aluminum alloy construction for maximum strength and durability
• 81.00mm bore — stock bore diameter for direct fitment
• 9.5:1 compression ratio — well-suited for forced induction (turbo/supercharger) applications
• Dedicated forging design optimizes strength-to-weight ratio for each specific application
• CNC-machined to tight tolerances for consistent sizing and minimal friction
• Engineered, forged, and machined in the USA (Mentor, OH)
• Complete kit includes: piston, rings, wrist pin, and circlips
• Note: Oversize pistons require cylinder re-sleeving or boring

Wiseco's 4-stroke piston kits are proven across all levels of street and performance riding, delivering the reliability and power you need for a high-performance Hayabusa engine build.