PISTON KIT 10-13 CRF250 76.80, 8775DC WOSSNER HONDA

This Wossner forged piston kit features a 76.82mm bore size (76.78mm actual), offering a +0.02mm oversize fitment for Honda CRF250R models from 2010 to 2013. Built with a two-ring configuration and made in Germany, this piston delivers high thermal efficiency and structural integrity. The elliptical design ensures even thrust load distribution, reducing localised stress and enhancing performance.

Features

• Forged construction with two-ring setup for strength and reliability

• Elliptical design maintains even pressure distribution under heat

• Optimised for superior heat transfer from combustion chamber to cylinder walls

• Manufactured in Germany

Specifications

• Bore Size: 76.82mm (actual 76.78mm)

• Displacement: 249 cm³

• Stroke: 53.80 mm

• Clearance: 0.04 mm

• Compression Ratio (Wossner): 14.20:1

• Compression Ratio (OEM): 13.20:1

• Dome Volume: +0.10 cm³

• Compression Height: 29.00 mm

• Theoretical Weight: 19.50 g

• Lock Part Number: CW16

• Pin Part Number: WP070

• Ring Set Part Number: 768XAS

Cross-Reference OEM Part Numbers

• 56-W950.C.WO

Vehicle Fitments

• 2010 Honda CRF250R

• 2011 Honda CRF250R

• 2012 Honda CRF250R

• 2013 Honda CRF250R