KTM 250 SX-F Factory Edition [2026-2027] - Piston Kit

PROX piston kit for the KTM 250 SX-F Factory Edition

The PROX piston kit is intended for the KTM 250 SX-F Factory Edition from 2026-2027. The forged aluminum piston is supplied as a complete kit with associated components and is suitable for the fuel injected model.

Function and structure

The piston is designed as a forged version. The standard piston compression and compression ratio of 14.5:1 allow for clear selection based on the existing engine configuration. The diameter is Ø 80,980 mm. The letter C is indicated for the size marking, while the oversize version is specified as +0.02.

Technical data

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø (mm): 80,980
• Letter oversize: C
• Oversize: +0.02
• Compression ratio: 14.5:1
• Stroke: 4T

Scope of delivery

The kit contains the piston, piston rings, a piston pin and circlips. This means that the piston components provided in the set are put together together.

Vehicle assignment

Suitable for the KTM 250 SX-F Factory Edition, built in 2026-2027. Before making your selection, please compare the diameter, oversize and compression ratio with the intended engine configuration.