PISTON KIT 07-09 CRF150R 66 HC, WOSSNER 8662DB 12.5:1 COMP

The Wossner 8662DB forged piston kit with a 66.01mm bore is designed for high-compression applications in Honda CRF150R models from 2007 to 2009. Manufactured in Germany, this piston delivers enhanced durability and thermal efficiency. Its elliptical design ensures even load distribution during heat expansion, minimizing localized stress and reducing the risk of piston failure.

Features

• Forged high-compression piston for strength and performance
• Designed for optimal heat transfer from combustion chamber to cylinder walls
• Elliptical shape provides a consistent bearing surface during thermal expansion
• Reduces the risk of piston collapse under localized pressure
• Manufactured in Germany

Specifications

• Bore: 66.01 mm
• Actual Bore Diameter: 65.96 mm
• Display: 149 cm³
• Hub Stroke: 43.70 mm
• Clearance: 0.05 mm
• Compression Height: 20.60 mm
• Dome Volume: -1.80 cm³
• Wossner Compression Ratio: 12.50:1
• OEM Compression Ratio: 11.70:1

Cross-Reference OEM Part Numbers

• Piston: 8662DB
• Lock: CW14
• Pin: WP058
• Ring Set: 660XKS
• Rod: P4024
• Part No.: 56-W4924+00B.WO

Vehicle Fitments

• Honda CRF150R 2007–2009