Wossner forged piston kit 8861DC is a +0.02mm oversized piston with a 66.02mm bore (measured at 65.97mm), designed specifically for Honda CRF150R models from 2012 to 2018. Featuring high-strength forged construction and a Teflon-coated skirt, this piston provides superior durability, thermal stability, and a precision fit ideal for competitive four-stroke applications.

Features

• Forged construction for maximum durability and reliability

• Elliptical design offers consistent load distribution under heat expansion

• Excellent heat transfer from the combustion chamber to cylinder walls

• Hard Teflon skirt coating for precise fit and bore conformity

• Reduces localised pressure to protect against piston collapse

• Made in Germany

Specifications

• Bore: 66.02mm (Measured: 65.97mm)

• Display Volume: 149 cm³

• Stroke: 43.80mm

• Clearance: 0.05mm

• Compression Height: 20.60mm

• Wossner Compression Ratio: OEM

• OEM Compression Ratio: 11.70:1

• Dome Volume: -1.40 cm³

• Part No.: 56-W914.C.WO (Wossner 8861DC)

• Ring Set: 660XKS

• Lock P/N: CW14

• Pin P/N: WP058

Vehicle Fitments

• 2012 Honda CRF150R

• 2013 Honda CRF150R

• 2014 Honda CRF150R

• 2015 Honda CRF150R

• 2016 Honda CRF150R

• 2017 Honda CRF150R

• 2018 Honda CRF150R