CYLINDER KIT 81mm KTM 250 SX-F EXC-F 23-26 ATHENA P400270100026 STD BORE

The Athena standard bore cylinder kit is designed for KTM SX-F 250 and EXC-F 250 4-stroke models, providing a complete top-end rebuild solution that maintains original engine geometry, tolerances, and operating characteristics. The kit includes a high-silicon aluminium cylinder, forged piston, wrist pin, circlips, and a full gasket set, ensuring compatibility with OEM components and consistent performance under demanding conditions.

Features

• Complete top-end rebuild kit for KTM 250 4-stroke engines

• Maintains original bore size and engine configuration

• Direct replacement for OEM components

• Plug-and-play installation with no modifications required

• High wear resistance and durability under off-road use

• Stable performance under high thermal and mechanical loads

• Reduced friction during engine operation

• Suitable for professional engine rebuilds and workshop use

Specifications

• Bore diameter: 81 mm (standard bore)

• Cylinder material: high-silicon aluminium with wear-resistant coating

• Piston type: forged, CNC-machined

• Piston coating: molybdenum disulphide

• Head gasket type: multi-layer steel (MLS), stainless steel, laser-cut

• Kit reference: P400270100026

Vehicle Fitments

• KTM SX-F 250 cc 2023–2026

• KTM EXC-F 250 cc 2024–2026