Wossner forged piston kit 8861DB is a +0.01mm oversized piston with a 66.01mm bore (measured at 65.96mm), specifically designed for the Honda CRF150R models from 2012 to 2018. Featuring a Teflon-coated skirt and precision-engineered forged construction, this piston ensures excellent durability, thermal performance, and a precise fit for high-revving four-stroke engines.

Features

• Forged construction provides maximum strength and longevity

• Elliptical design ensures even pressure distribution during thermal expansion

• High-efficiency heat transfer from the combustion chamber to cylinder walls

• Hard Teflon skirt coating enhances fit and bore conformity

• Reduces localised stress to prevent piston collapse

• Made in Germany

Specifications

• Bore: 66.01mm (Measured: 65.96mm)

• 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.B.WO (Wossner 8861DB)

• 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