The Wossner 8662DC forged piston kit with a 66.02mm bore is built for high-compression applications in Honda CRF150R models from 2007 to 2009. Made in Germany, this piston is engineered for strength, thermal efficiency, and reliability. Its elliptical profile ensures uniform load distribution under thermal expansion, minimizing stress and reducing the likelihood of piston failure.

Features

• High-compression forged piston for performance and durability


• Optimized for efficient heat transfer from combustion to cylinder walls


• Elliptical design ensures uniform bearing surface during heat expansion


• Prevents localized pressure buildup and piston collapse


• Manufactured in Germany

Specifications

• Bore: 66.02 mm


• Actual Bore Diameter: 65.97 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: 8662DC


• Lock: CW14


• Pin: WP058


• Ring Set: 660XKS


• Rod: P4024


• Part No.: 56-W4924+00C.WO

Vehicle Fitments

• Honda CRF150R 2007–2009