Restore your engine’s original performance with the Athena Standard Bore Cylinder Kit for KTM SX-F 250 and EXC-F 250, engineered for maximum reliability, durability, and consistent performance in demanding off-road conditions.

Designed following OEM KTM specifications, this cylinder and piston kit is the ideal solution for complete engine rebuilds, maintaining original geometry, tolerances, and thermal behavior.

Complete KTM 250 4-Stroke Cylinder and Piston Kit

This Athena top-end kit includes premium components developed for racing and heavy-duty applications:

• High-silicon aluminum cylinder, featuring advanced plating for superior wear resistance, optimal heat dissipation, and dimensional stability.
• High-performance forged piston, CNC-machined for tight tolerances and coated with molybdenum disulfide to reduce friction, noise, and wear under extreme conditions.
• Heavy-duty wrist pin and circlips, designed for maximum mechanical strength and long service life.
• Complete gasket kit, including MLS (Multi-Layer Steel) stainless steel head gasket, laser-cut for optimal sealing even under high thermal and mechanical stress.

OEM Fitment and Plug-and-Play Installation

The Athena KTM 250 4T cylinder kit is designed for full OEM compatibility:

• No modifications required
• Direct plug-and-play installation
• Perfect interchangeability with OEM components

Ideal for professional workshops, engine builders, and riders looking for a reliable rebuild solution.

Proven Reliability and Racing Performance

Backed by Athena’s racing experience and extensive testing under extreme conditions, this kit ensures:

• Consistent thermal stability
• Reduced internal friction
• Extended component lifespan
• Reliable performance over time

The perfect choice to keep your KTM 250 4-stroke engine performing at its best.

NOTE: Race Use Only Product. Not intended for street use.