Wossner 91.50mm (91.46mm) forged piston kit is designed for Husqvarna TC 400 and SMR 400 models. Engineered for durability and precision, this piston ensures efficient heat transfer and uniform expansion, reducing localized pressure and 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 enhanced combustion efficiency


• Elliptical design for uniform bearing surface and reduced localized pressure


• Precision-engineered for reliable performance


• Made in Germany

Specifications

• Bore Size: 91.50mm (91.46mm)


• Oversize: 0.02mm


• Displacement: 399cc


• Stroke: 60.80mm


• Clearance: 0.06mm


• Compression Ratio: OEM (11.40:1)


• Dome Volume: +1.90cm³


• Compression Height: 24.50mm


• Lock Part Number: CW20


• Pin Part Number: WP038


• Ring Set Part Number: 915XSY

Vehicle Fitments

• Husqvarna TC 400 (1999-2001)


• Husqvarna SMR 400 (2005-2007)