Wossner forged piston kit designed for superior strength and durability. Engineered for optimal heat transfer from the combustion chamber to the cylinder walls. The elliptical design ensures a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany for high-quality performance. This piston has an oversize bore of +1.00mm.

Features

• High-strength forged construction for durability


• Optimized heat transfer for improved engine performance


• Elliptical design for even load distribution and prevention of piston collapse


• Precision manufacturing in Germany


• Oversize bore +1.00mm

Specifications

• Bore Size: 69.50mm


• Actual Diameter: 69.45mm


• Displacement: 229 cm³


• Stroke: 62.20mm


• Clearance: 0.05mm


• Compression Ratio: OEM


• OEM Compression Ratio: 10.00:1


• Dome Volume: +4.10 cm³


• Compression Height: 21.70mm

Included Components

• Piston: Wossner 8870D100


• Ring Set: 695XKS


• C-Clip Set: CW15


• Pin: WP102

Cross-Reference OEM Part Numbers

• 13101-HN6-000


• 13101-HM8-A40


• Namura NA-10025

Vehicle Fitments

• Honda TRX250EX Sportrax (2001-2013)


• Honda TRX250 Recon Utility (1997-2001)


• Honda TRX250 FourTrax Recon ES/TE/TM (2002-2013)


• Honda TRX250X (2009, 2011-2012)