PISTON KIT 10-13 YZF450 97 A, FORGED WOSSNER 8776DA, 33D-11631-00-00

Wossner forged piston kit designed for the Yamaha YZ450F (Fuel Injection) models from 2010 to 2013. Manufactured in Germany, this piston ensures superior strength and design, optimizing combustion chamber heat transfer to the cylinder walls. The elliptical design provides a uniform bearing surface, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.

Features

• Forged construction for increased 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: OEM


• OEM Compression Ratio: 12.50:1


• Dome Volume: -5.40 cm³


• Compression Height: 24.00 mm


• Theoretical Weight: Not specified

Included Components

• Piston: Wossner 8776DA


• Lock: CW18


• Pin: WP072


• Ring Set: 970ADS-2


• 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