PISTON KIT 81 SET/4 1999-2007 SUZUKI HAYABUSA HC WOSSNER K8730DA-4 HC 3-RING

This piston kit is intended for Suzuki Hayabusa models from 1999 to 2007 and features Wossner forged pistons from the Pro Series. With a standard bore of 81.00mm and a high compression ratio, it is designed to increase engine performance. The pistons are elliptically shaped to enhance load distribution and heat transfer, helping prevent structural failure under stress. Manufactured in Germany, this set supports displacement variations and is optimised for high-compression setups.

Features

• Set of 4 forged Wossner pistons (Pro Series)
• Standard bore size (81.00mm, actual piston diameter 80.95mm)
• 3-ring design for performance applications
• Elliptical design for balanced thrust load and reduced piston collapse risk
• Designed for improved heat dissipation and structural strength
• Made in Germany

Specifications

• Bore Size: 81.00mm (actual piston size 80.95mm)
• Displacement Range: 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: RIK81.00A
• K8730DA-4

Vehicle Fitments

• Suzuki Hayabusa 1999–2007