KTM125SX and Husky TC125 2016-2023 Carb Cylinder Head Insert

*** TSP Heads & Inserts now always include Cylinder head O-rings & Washers free of charge! ***

You will receive one (1) cylinder head insert for your make/model.

This CNC machined TSP head insert suits KTM125SX and Husky TC125 2016-on models and fits into the stock cylinder head outer part. It features an improved combustion chamber design that gives more performance from bottom to top as well as reduced risk of detonation. Although it signs off slightly earlier in the overrev it will be easier on hill climbs, easier to lift the front and faster corner to corner due to the increased torque up to 12,000rpm.

The head insert is designed to work with the stock base gasket thickness and gives a big boost to power throughout the rev range. It has been designed and tested to work with 98 RON fuel and will also suit higher octane FIM spec fuels.

All TSP mods are designed and dyno tested in-house at TSP so you can be sure you’re getting reliable performance for local conditions.

Dyno graph shows results on a 150… it can be used as an accurate guide for the results expected on a 125 assuming jetting and engine condition are good.

Below is a video with this exact insert (fitted to our TSP cap coming soon), included with our TSP ignition and scalvini pipe fitted on a 125/150SX model.

Additional information