This Wossner forged piston kit, part number 8820DA, features a standard 94.96mm bore (designated as 95mm) and is designed for TM MX-F450 (2009–2010), MX-Fi450 (2011), and EN-Fi450 (2011) models. Manufactured in Germany, the piston is engineered for high-performance four-stroke engines, offering excellent durability, thermal efficiency, and uniform load distribution via its elliptical profile.

Features

• Forged construction for high strength and durability


• Elliptical design for uniform expansion and load distribution


• Optimized for efficient combustion heat transfer


• Made in Germany


• Direct OEM replacement


• Easy to install; professional installation recommended if unsure

Specifications

• Bore Size: 94.96mm (Standard)


• Displacement: 449cm³


• Stroke: 63.40mm


• Clearance: 0.04mm


• Dome Volume: -6.40cm³


• Compression Ratio: 13.00:1 (OEM)


• Compression Height: 21.00mm

Cross-Reference OEM Part Numbers

• CW19 (Lock)


• WP037 (Pin)


• 950ADS-2 (Ring Set)

Vehicle Fitments

• TM MX-F450 (2009–2010)


• TM MX-Fi450 (2011)


• TM EN-Fi450 (2011)