KTM 300 EXC Hardenduro [2026] - cast pistons

VERTEX cast piston for KTM 300 EXC Hardenduro 2026

The VERTEX cast piston is designed as a replacement component for the engine of the KTM 300 EXC Hardenduro from 2026. Its design combines a cast piston type with an aluminum construction and is therefore suitable for the targeted renewal of the piston component in the 2T engine.

Function and execution

The piston works with a standard compression and has two piston rings. The defined oversize supports the selection to match the specified bore and makes assignment easier when carrying out a corresponding engine repair.

Technical data

• Brand: VERTEX
• Material: aluminum
• Piston Type: Cast
• Piston compression: standard
• Diameter Ø: 71.955 mm
• Letter oversize: D
• Oversize: +0.03
• Bore diameter: 72mm
• Piston rings: 2
• Version: 2T

Vehicle assignment

The VERTEX cast piston is designed for the KTM 300 EXC Hardenduro, built in 2026. The vehicle selection should be based on the full year of manufacture and the technical dimensions, in particular the diameter Ø 71.955 mm, bore diameter 72 mm and the oversize +0.03.

VERTEX specializes in the production of engine components for off-road machines and is used as an original equipment manufacturer by numerous motorcycle manufacturers. The piston therefore offers a clearly defined technical basis for repairing the associated engine.