Wossner 97.00mm (96.96mm) forged piston kit is designed for KTM SX-F 450, SXS-F 450, XC-F 450, and SM-R 450 models from 2007 to 2012. Engineered for strength and precision, this piston ensures efficient heat transfer to the cylinder walls, providing uniform expansion and reducing localized pressure. The elliptical design distributes thrust loads evenly, preventing piston collapse. Manufactured in Germany, it meets high-quality standards for reliable performance.

Features

• Wossner forged piston for superior strength and durability


• Optimized heat transfer for improved combustion efficiency


• Elliptical design for uniform bearing surface and reduced localized pressure


• Precision-engineered to prevent piston collapse


• Made in Germany

Specifications

• Bore Size: 97.00mm (96.96mm)


• Standard Size (STD)


• Displacement: 449cc


• Stroke: 60.80mm


• Clearance: 0.04mm


• Compression Ratio: OEM (12.50:1)


• Dome Volume: -2.60cm³


• Compression Height: 21.30mm


• Lock Part Number: CW19


• Pin Part Number: WP037


• Ring Set Part Number: 970ADS-2


• Gasket Part Number: D4019


• Rod Part Number: P4017


• Theoretical Weight: Not specified

Cross-Reference OEM Part Numbers

• 77330007500


• 4937M09700

Vehicle Fitments

• KTM SX-F 450 (2007-2012)


• KTM SXS-F 450 (2007-2008)


• KTM XC-F 450 (2007-2010)


• KTM SM-R 450 (2008-2012)