PISTON KIT 05-18 KTM 250 66.40, WOSSNER 8169DC SX, EXC

Wossner forged piston kit designed for KTM SX250 (2005-2018), EXC250 (2006-2018), Freeride 250R (2014-2015), Husqvarna TC250 (2014-2015), and Betamotor RR250 (2013-2015) models. Engineered for superior strength and optimal heat transfer, these pistons feature an elliptical design to ensure uniform bearing surface under heat expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany.

Features

• Forged piston 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: 66.41mm
• Actual Bore Diameter: 66.36mm
• Displacement: 249 cm³
• Stroke: 72.00mm
• Clearance: 0.06mm
• Wossner Compression Ratio: 2-stroke
• OEM Compression Ratio: 2-stroke
• Compression Height: 38.00mm
• Lock Part Number: CW18
• Pin Part Number: WP033
• Ring Set Part Number: RSB6640 x 2
• Rod Part Number: P2023

Cross-Reference OEM Part Numbers

• 54830007300 I

Vehicle Fitments

• KTM SX250 (2005-2018)
• KTM EXC250 (2006-2018)
• KTM Freeride 250R (2014-2015)
• Husqvarna TC250 (2014-2015)
• Betamotor RR250 (2013-2015)