KTM 250 EXC F [2017-2023] - GP Racer Choice forged pistons

VERTEX GP Racer Choice forged pistons for KTM 250 EXC F

The VERTEX GP Racer Choice forged piston was developed for use in the KTM 250 EXC F from the 2017-2023 model year range. As a forged aluminum version, it combines piston compression designed for racing with a precisely defined oversize of +0.02.

Designed for high motor loads

The shape and design of the piston crown supports a controlled flame front and is optimized to achieve the maximum permissible compression ratio. Reinforcements stiffen the piston structure and reduce piston crown deformation under full load.

A surface treatment serves to reduce friction. The short piston pin has a chamfer with a DLC (Diamond Like Carbon) coating. The locking ring with a nose on the outside counteracts twisting at high speeds. The extra-thin GNH piston ring made of gas nitrided steel increases wear resistance.

Technical data

• Brand: VERTEX
• Material: aluminum
• Piston Type: Forged
• Piston compression: Racing
• Diameter Ø: 77.98 mm
• Letter oversize: C
• Oversize: +0.02
• Bore diameter: 78.00 mm
• Rings Quantity: Set
• Stroke: 4T

Vehicle assignment

Suitable for the KTM 250 EXC F, built between 2017 and 2023. The selection of oversize C and the bore diameter of 78.00 mm should be compared with the engine dimensions of the respective vehicle.