This Wossner forged piston kit is a standard-size component designed for KTM EXC500 and Husqvarna FE501 four-stroke engines. With a bore size of 95mm and engineered for high-performance applications, this piston ensures optimal thermal transfer and structural reliability under intense operating conditions.

Features

• High-strength forged construction for maximum durability

• Elliptical profile maintains consistent bearing surface during thermal expansion

• Engineered for efficient combustion heat dissipation to cylinder walls

• Designed to evenly distribute thrust loads and prevent piston collapse

• Manufactured in Germany

Specifications

• Bore Size: 95.00mm

• Actual Piston Size: 94.95mm

• Display Displacement: 510 cm³

• Stroke: 72.00mm

• Piston Clearance: 0.05mm

• Wossner Compression Ratio: OEM

• OEM Compression Ratio: 11.80:1

• Dome Volume: -6.80 cm³

• Compression Height: 22.80mm

• Circlip Part Number: CW19

• Pin Part Number: WP071

• Ring Set Part Number: 950ADS-2

Cross-Reference OEM Part Numbers

• Part No: 56-W925.A.WO

• Cross Reference: 79630007000, 78730007000, 40064M09500, 76630007000, 40131M09500

Vehicle Fitments

• KTM EXC500 (2012– )

• Husqvarna FE501 (2014–2016)

• Husqvarna FE501 (2017–2019)