PISTON KIT 00-09 KTM 400 89.00 WOSSNER 8636DA EXC, SX, HC

Wossner forged piston kit designed for KTM 400 LC4 (1998-2001) models. This high-compression Pro Series piston is engineered for superior strength and optimal heat transfer. Featuring an elliptical design, it ensures a uniform bearing surface under heat expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany.

Features

• High-compression Pro Series piston
• Forged for increased strength and durability
• Optimized heat transfer for efficient combustion chamber performance
• Elliptical design for even thrust load distribution and reduced piston collapse
• Manufactured in Germany

Specifications

• Bore Size: 89.00mm
• Actual Bore Diameter: 88.94mm
• Displacement: 398 cm³
• Stroke: 64.00mm
• Clearance: 0.06mm
• Wossner Compression Ratio: 12.50:1
• OEM Compression Ratio: 11.00:1
• Dome Volume: +12.20 cm³
• Compression Height: 27.50mm
• Lock Part Number: CW20
• Pin Part Number: WP038
• Ring Set Part Number: 890XSY

Cross-Reference OEM Part Numbers

• 57530007000

Vehicle Fitments

• KTM 400 LC4 (1998-2001)