TSP ECU Re-flash – KTM/Husky 125 TBI

The TSP ECU tune is designed for KTM and Husky 125 TBI 2023+ Models with stock or modified heads and ignition. Improvements are made by modifying the stock fuel, ignition and power valve maps.


Your bike's VIN# is needed for all ECU Re-flashes. Typically 17 characters and can be found on the bike's frame steering tube or registration/pink slip.
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SKU: ECU.FLSH.125TBI.23on Category:


The TSP ECU tune is designed for KTM and Husky 125 TBI 2023+ Models.

The ECU tune makes a huge difference to the 125 TBI over stock, with some key features being:

  • Significant mid-top RPM performance with more over-rev
  • Drastically improved throttle performance in the whole RPM range
  • Both Green & White maps are tuned and the stock map switch works like normal to select between the customized maps.
  • Smoother throttle response
  • Better fueling
  • Much more enjoyable to ride

Although the ECU tune can be done on it’s own, doing this ECU upgrade as a package with our TSP Insert/Head at the same time will offer much better performance gains over stock, and we strongly advise going for our full TBI Power Kit for the best performance gains.

If you are deciding between our head/insert or an ECU flash, it is advised that you go for our ECU tune first. The ECU flash will enable larger gains than the head/insert by itself, by improving fuel, ignition and power valve maps. There are gains to be made by just swapping the head/insert especially with additional smoothness, but this is best complimented with the ECU flash so you get the most out of the head design.

Note: In order for us to reflash your TBI ECU, please ship us your ECU with a copy of a work order form, and be sure to include your bike’s VIN # on the work order form.  We are not able to flash your TBI ECU without the VIN #.


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Below are the make(s) and model(s) that will fit this part.

Year Make Engine CC Model
Year Make Engine CC Model
2023 Husqvarna 125 TC TBI
2023 KTM 125 SX TBI
2023 KTM 125 XC TBI
2024 Gas Gas 125 MC TBI
2024 Husqvarna 125 TC TBI
2024 KTM 125 SX TBI
2024 KTM 125 XC TBI

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