KTM 250 EXC-F SIX Days [2014-2022] - Forged pistons

PROX forged pistons for the KTM 250 EXC-F SIX Days

The PROX forged piston is designed as a replacement for the KTM 250 EXC-F SIX Days in the 2014-2022 model year range. Its forged aluminum design combines precise manufacturing on modern CNC machines with a low-expansion, low-friction piston alloy.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 77.97 mm
• Letter oversize: B
• Oversize: +0.01
• Compression ratio: 14.4:1
• Stroke: 4T
• Specificity: Flat crown with raised top / 4 valve pockets

Version as a piston kit

The PROX piston kit comes with piston rings, piston pins and circlips. This means that the components intended for the piston are combined in the kit. The design is suitable for standard compression applications and takes into account the specified piston geometry with a flat crown, raised top and four valve pockets.

Vehicle assignment

Suitable for KTM 250 EXC-F SIX Days, built between 2014 and 2022.

Factual advice on selection

The diameter of 77.97 mm, the oversize letter B, the oversize specification +0.01 and the compression ratio 14.4:1 are particularly important for the assignment. These technical data should be compared with the intended engine before ordering.