Honda CRF 250 RX Enduro [2019] - forged pistons

PROX forged pistons for Honda CRF 250 RX Enduro 2019

The PROX forged piston is designed for the engine of the Honda CRF 250 RX Enduro from 2019. Its aluminum design combines forged construction with OEM quality. The aluminum alloy used is designed to reduce friction and support reliability.

Technical features

• Piston type: forged
• Material: aluminum
• Diameter: Ø 78.98 mm
• Piston compression: standard
• Compression: 13.9:1
• Letter oversize: B
• Oversize: +0.01
• Rings Quantity: Set
• Stroke: 4T
• Flask shape: flat crown with raised top
• Valve pockets: 4

Vehicle assignment

The forged piston fits the Honda CRF 250 RX Enduro in the full 2019 model year range.

Selection guide

The diameter Ø 78.98 mm, the marking B and the oversize +0.01 are particularly relevant for the selection. The standard compression of 13.9:1 and the 4T version assign the piston to the intended engine concept. The flat crown with raised top and 4 valve pockets describes the specific piston shape.