VHM Head Insert KTM 125 SX / TC 125 16-22

The VHM combustion chamber insert AE32257-026 is a high performance component designed for use with VHM cylinder head systems, allowing precise combustion adjustment and optimizing performance in racing conditions.

This insert has a combustion chamber volume of 11.60cc and has been developed by VHM as a standard option for 12° VHM pistons, offering balanced performance across the entire rev range, improved throttle response and stable engine operation. The CNC machined construction ensures precision application, proper thermal management and high durability under heavy use.

The insert change allows for easy fine tuning of the compression ratio without replacing the entire head.

Technical characteristics

• VHM combustion chamber insert

• Volume: 11.60cc

• Squish: 0.90mm

• Piston height: +0.00mm

• Designed for VHM 12° pistons

• CNC machined billet aluminum

• Compatible only with VHM cylinder head (not OEM head)

Compatibility (Fitment)

• KTM 125 SX (2016 → 2022)

• Husqvarna TC125 (2016 → 2022)

• GasGas MC125 (2021 → 2023)