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

PROX forged pistons for KTM 250 EXC-F SIX Days

The PROX forged piston is designed to replace the original piston of the KTM 250 EXC-F SIX Days in the 2014-2022 model year range. Manufacturing on modern CNC systems supports precise execution for use in the 4T engine. Its low expansion and low friction are tailored to the requirements of stressed engine operation.

Function and execution

The piston is made of aluminum and is forged. The flat crown with raised top part and four valve pockets form the specified piston shape. The standard piston compression and compression ratio of 14.4:1 characterize the design of this piston.

Technical data

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Diameter: 77.95mm
• Piston compression: standard
• Compression ratio: 14.4:1
• Letter oversize: A
• Oversize: STD
• Stroke: 4T
• Piston shape: Flat crown with raised top / 4 valve pockets

Vehicle assignment

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

Kit contents

The piston kit comes with piston rings, piston pins and circlips. This means that the kit components intended for piston use are included together.