Wossner high-compression forged piston kit designed for the Yamaha YZ450F (Fuel Injection) models from 2010 to 2013. Manufactured in Germany, this piston offers superior strength and an optimized design for efficient combustion chamber heat transfer. The elliptical shape ensures an even bearing surface, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.

Features

• High-compression design for increased performance


• Forged construction for superior strength and durability


• Optimized heat transfer for efficient combustion


• Elliptical design for uniform bearing surface and even load distribution


• Manufactured in Germany

Specifications

• Bore: 97 mm


• Actual Bore Size: 96.96 mm


• Display: 449 cm³


• Stroke: 60.80 mm


• Clearance: 0.04 mm


• Wossner Compression Ratio: 13.50:1


• OEM Compression Ratio: 12.50:1


• Dome Volume: -2.10 cm³


• Compression Height: 24.00 mm


• Theoretical Weight: Not specified

Included Components

• Piston: Wossner 8783DA


• Lock: CW18


• Pin: WP072


• Ring Set: 970ADS


• Rod: P4032

Cross-Reference OEM Part Numbers

• 33D-11631-00-00


• 33D-116A0-00-00


• 33D-11631-00-00 + 33D-11603-00-00 + 33D-11633-00-00 + 93450-19052-00

Vehicle Fitments

• Yamaha YZ450F (Fuel Injection) 2010-2013