The Wossner 8601DB forged piston kit features a 95.01mm bore and is compatible with Yamaha YFZ450 models from 2004 to 2013. Designed and manufactured in Germany, this piston delivers durability and consistent performance through superior heat transfer and an elliptical profile that minimizes localized pressure during thermal expansion.

Features

• Forged piston construction for strength and reliability


• Designed for efficient heat dissipation from combustion chamber to cylinder walls


• Elliptical shape promotes uniform bearing surface under thermal expansion


• Reduces risk of piston collapse and uneven pressure


• Manufactured in Germany

Specifications

• Bore: 95.01 mm


• Actual Bore Diameter: 94.96 mm


• Display: 449 cm³


• Hub Stroke: 62.00 mm


• Clearance: 0.05 mm


• Compression Height: 25.00 mm


• Dome Volume: -7.40 cm³


• Compression Ratio: OEM (11.90:1)


• Theoretical Weight: Not specified

Cross-Reference OEM Part Numbers

• Piston: 8601DB


• Lock: CW20


• Pin: WP038


• Ring Set: 950XSY


• Rod: P4029


• Part No.: 56-W4865+00B.WO

Vehicle Fitments

• Yamaha YFZ450 2004–2013