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

This Wossner forged piston kit features a 76.81mm bore size (76.77mm actual), providing a +0.01mm oversize option for Honda CRF250R models from 2010 to 2013. Featuring a two-ring configuration and manufactured in Germany, this piston is engineered for high performance, with superior heat transfer and structural reliability. The elliptical design ensures even distribution of thrust loads under thermal expansion, minimising wear.

Features

• Forged piston construction with two-ring setup for durability

• Elliptical profile maintains even pressure distribution during operation

• Optimised for efficient combustion heat transfer to cylinder walls

• Manufactured in Germany

Specifications

• Bore Size: 76.81mm (actual 76.77mm)

• 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.B.WO

Vehicle Fitments

• 2010 Honda CRF250R

• 2011 Honda CRF250R

• 2012 Honda CRF250R

• 2013 Honda CRF250R