PISTON KIT SET/4 HAYABUSA 85 HC, WOSSNER K8730D400-4 SUZUKI, HC / 3-RING 99-07 DISP. 1429cc

This piston kit is designed for Suzuki Hayabusa models from 1999 to 2007 and includes a set of four forged Wossner pistons from the Pro Series. With a +4.00mm oversize bore (85.00mm), the kit increases engine displacement to 1429cc. These pistons are engineered with an elliptical design to ensure even thrust load distribution and effective heat expansion management. Manufactured in Germany, this high-compression kit is built for both demanding street use and competitive racing applications.

Features

• Set of 4 forged Wossner pistons (Pro Series)

• +4.00mm oversized bore (85.00mm, actual piston diameter 84.95mm)

• 3-ring configuration

• Elliptical shape for balanced heat expansion and load distribution

• Optimised for heat transfer and structural reliability

• Made in Germany

Specifications

• Part Number: K8730D400-4

• Bore Size: 85.00mm (actual piston size 84.95mm)

• Oversize: +4.00mm

• Displacement: 1429cc

• Displacement Range Displayed: 1299 / 1395 / 1429 cm³

• Stroke: 63.00mm

• Clearance: 0.05mm

• Wossner Compression Ratio: 13.50:1

• OEM Compression Ratio: 11.00:1

• Dome Volume: -2.45cm³

• Compression Height: 25.10mm

Cross-Reference OEM Part Numbers

• Clip: CW20

• Piston Pin: WP029

• Replacement Ring Set: 850XDS

Vehicle Fitments

• Suzuki Hayabusa 1999–2007