The Wossner 8662DA forged piston kit with a 66.00mm bore is designed for high-compression performance in Honda CRF150R models from 2007 to 2009. Manufactured in Germany, this piston offers excellent durability, thermal performance, and strength. Its elliptical shape ensures uniform pressure distribution under expansion, minimizing stress and preventing piston collapse.

Features

• High-compression forged piston for enhanced performance and durability


• Engineered for efficient heat transfer to cylinder walls


• Elliptical design provides uniform bearing surface under thermal expansion


• Reduces localized pressure and risk of piston collapse


• Manufactured in Germany

Specifications

• Bore: 66.00 mm


• Actual Bore Diameter: 65.95 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: 8662DA


• Lock: CW14


• Pin: WP058


• Ring Set: 660XKS


• Rod: P4024


• Part No.: 56-W4924+00A.WO


• OEM Reference: 13101-KSE-670

Vehicle Fitments

• Honda CRF150R 2007–2009