KTM 250 EXC F [2014-2020] - Forged pistons

PROX forged pistons for KTM 250 EXC F from 2014 to 2020

The PROX forged piston is intended for the KTM 250 EXC F in the entire 2014-2020 model year range. The forged aluminum design combines standard piston compression with a diameter of 77.95 mm.

PROX makes the piston from a special alloy. This minimizes friction and thereby supports the reliability and performance of the engine. The piston shape has a flat crown with a raised top and 4 valve pockets.

Technical features

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø (mm): 77.95
• Letter oversize: A
• Oversize: STD
• Rings Quantity: Set
• Stroke: 4T
• Specificity: Flat crown with raised top / 4 valve pockets

Vehicle assignment

The forged piston fits the KTM 250 EXC F, built between 2014 and 2020. The selection is based on the specified vehicle assignment as well as the piston dimensions and design features mentioned.

Execution at a glance

With a diameter of 77.95 mm, standard compression, the marking A for “letter oversize” and the indication “STD” for “oversize”, the PROX piston offers clearly defined technical key data for assignment. The 4T version and the four valve pockets are part of the specified piston specification.