PISTON 94-08 KTM620 640 101 A, FORGED WOSSNER KIT 8524DA

Wossner forged piston kit with a 101mm bore, designed for KTM 620, 625, 640 LCA, SX, Duke, and Supermoto models. Engineered for optimal combustion chamber heat transfer and uniform bearing surface under heat expansion, reducing localized pressure and piston collapse. Manufactured in Germany for durability and precision.

Features

• Forged piston for superior strength and design
• Optimized heat transfer to cylinder walls
• Elliptical design for uniform bearing surface and even thrust load distribution
• Manufactured in Germany

Specifications

• Bore: 101mm
• Standard size piston (PN# 8524DA)
• Lock Part Number: CW22
• Pin Part Number: WP009
• Ring Set Part Number: 1010XSY
• Displacement: 600 cm³
• Stroke: 76.00mm
• Clearance: 0.06mm
• Wossner Compression Ratio: OEM
• OEM Compression Ratio: 11.70:1
• Dome Volume: +7.60 cm³
• Compression Height: 26.50mm

Cross-Reference OEM Part Numbers

• 7849M10100

Vehicle Fitments

• KTM 620 LC4 (1994-1997)
• KTM 620 Duke (1994-1997)
• KTM 620 SC (1998-2001)
• KTM 625 SXC (2002-2007)
• KTM 640 LC4 (1998-2007)
• KTM 660 SMC (2003-2009)