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KTM EXC 125 TBI - FLAWLESS ECU Performance Flash
KTM EXC 125 TBI Tuning from 2024 – what the Performance Flash achieves
The FLAWLESS ECU Performance Flash replaces the stock software in the original ECU of your KTM EXC 125 TBI, model years 2024 and newer. We adjust the injection, power valve, and electronic oil pump maps – resulting in a significant increase in power, noticeably higher torque, smoother throttle response, and improved lubrication, without the need for additional hardware on the motorcycle.
Unlike piggyback tuning modules, we modify the original software directly. The optimization remains invisible from the outside, the ECU software number remains unchanged, and KTM diagnostic tools remain fully functional.
We write the software individually for your motorcycle and tune it to your specific installed hardware – such as your exhaust system and, if applicable, an aftermarket piston or cylinder head.
KTM EXC 125 TBI: Stock vs. Optimized Software
| Feature | Stock | with FLAWLESS ECU Performance Flash |
|---|---|---|
| Peak Power | KTM does not provide an official power output for the EXC 125 TBI | Significant increase |
| Torque | Not specified by manufacturer | Noticeably higher |
| Power Delivery | Stock maps | More homogeneous and linear |
| Part-throttle jerkiness | Present | Eliminated |
| Throttle response between idle and 50% throttle | Stock mapping | Significantly smoother |
| Injection maps and AFR values | Stock maps | Optimized for the specific setup |
| Exhaust gas temperature | Stock level | In the optimal range |
| Power valve | Stock maps | Adjusted |
| 2-stroke oil injection quantity | Stock electronic oil pump map | Increased, significantly better lubrication |
| Additional hardware on the bike | – | None required |
Performance upgrade for the KTM EXC 125 TBI
We write the tuning software individually for your KTM EXC 125 TBI and adapt it precisely to your installed hardware. This allows you to achieve a significant increase in power as well as noticeably higher torque.
Beyond pure power, we primarily improve rideability: the power delivery of your EXC 125 TBI becomes more homogeneous and linear.
KTM does not provide an official power rating for the EXC 125 TBI. Our statements are therefore based on the increase relative to the stock condition, as measured on our dynamometer.
Smoother throttle response and no part-throttle jerkiness
With our software optimization, we eliminate the annoying part-throttle jerkiness of your EXC 125 TBI.
This gives you, among other things, a significantly smoother throttle response between idle and 50% throttle – exactly the range where you spend most of your time off-road.
Optimized injection, power valve, and AFR values for the KTM EXC 125 TBI
We also adjust the injection and power valve maps. This ensures that the air-fuel ratio (AFR) values and exhaust gas temperature of your EXC 125 TBI remain in the optimal range.
This benefits not only power but also reduces the thermal load on your engine.
More 2-stroke oil via adjusted oil pump maps
Your EXC 125 TBI features an electronic oil pump. By adjusting its maps, we increase the injected 2-stroke oil quantity.
The result is significantly better lubrication for your engine – a factor that is especially important for a high-performance two-stroke.
Individual tuning for your setup
Every software optimization for the KTM EXC 125 TBI is tuned to your motorcycle's specific configuration. Please provide the following information in the comments field at checkout:
- Installed exhaust system, e.g., Doma or FMF
- Aftermarket piston installed: yes or no
- Aftermarket cylinder head installed: yes or no
This allows us to optimally tune the mapping of your KTM EXC 125 TBI to your specific motorcycle.
How the software optimization for your KTM EXC 125 TBI works
- Configure – Order your FLAWLESS ECU Performance Flash and select the desired options.
- Send in your ECU – Remove the ECU from your KTM EXC 125 TBI and send it to us, well-packaged and insured.
- Programming – Once received, your ECU is typically processed by our technicians within 24 hours. For shipments from Switzerland, processing time is usually 24 to 72 hours.
- Install and ride – We will send your ECU back to you. Simply plug it in, install, and you’re ready to go.
No additional hardware necessary
No additional control modules are installed on the bike for this software optimization. We program your original ECU. The unit is neither opened nor damaged during this process and remains physically unchanged from the outside.
The software number of your ECU remains unchanged, and KTM diagnostic tools can continue to be used without restriction.
Why FLAWLESS Industries?
We have been developing our own software optimizations in-house for over 5 years and write every mapping individually – we do not use pre-purchased, off-the-shelf files.
The basis for our work is created on our own high-performance simulation dynamometer. Every setup variant is physically installed and specifically tuned during development. Our maps are therefore based on real measurement data rather than guesswork or copied files.
We process well over 1000 ECUs annually. Development and programming take place entirely in Germany. If you have questions about your setup, you can reach us directly – we will advise you before you order on which configuration fits your motorcycle and intended use.
Suitable for
- KTM EXC 125 TBI model years 2024 and newer
Do you ride a different model? You can find further optimizations for KTM in our KTM Enduro category.
Your benefits
- Software individually tuned to your setup
- Significant power increase and noticeably more torque
- More homogeneous and linear power delivery
- Eliminated part-throttle jerkiness
- Significantly smoother throttle response between idle and 50% throttle
- Optimized injection maps and AFR values
- Exhaust gas temperature in the optimal range
- Adjusted power valve maps
- Increased 2-stroke oil quantity via electronic oil pump for significantly better lubrication
- Software number remains unchanged; KTM diagnostic tools remain fully functional
- Processing typically within 24 hours
- No additional hardware required on the motorcycle
Note on usage
The FLAWLESS ECU Performance Flash alters the engine control software from the stock configuration. It is approved for use exclusively on closed courses or racetracks.
Frequently asked questions about KTM EXC 125 TBI optimization
How much power does the KTM EXC 125 TBI tune add?
You will receive a significant increase in power and noticeably higher torque. At least as noticeable are the more linear power delivery, the elimination of part-throttle jerkiness, and the smoother throttle response.
Why is there no stock power figure in the table?
KTM does not provide an official power rating for the EXC 125 TBI. Our statements are therefore based on the difference relative to the stock condition as measured on our dynamometer.
What changes regarding throttle response?
We eliminate the jerkiness in the part-throttle range. This makes the throttle response between idle and 50% throttle significantly smoother – precisely the range where you spend the most time when off-road.
What does the increased 2-stroke oil quantity achieve?
We increase the oil injection quantity via the electronic oil pump maps. This ensures significantly better lubrication of your engine.
Is the power valve also adjusted?
Yes. In addition to the injection maps, we also adjust the power valve maps for the EXC 125 TBI.
Is the software tuned to my exhaust system?
Yes. During tuning, we take into account the installed exhaust system as well as any aftermarket piston or cylinder head. Please provide these details in the comment field of your order.
Is the optimization suitable for all EXC 125 TBI models from 2024 onwards?
Yes. This software optimization is specifically designed for the KTM EXC 125 TBI model years 2024 and newer.
Can I still use a KTM diagnostic tool?
Yes. KTM diagnostic tools continue to work without restriction because the ECU software number remains unchanged.
Does the ECU need to be opened for programming?
No. The ECU is not opened or damaged during programming. The optimization is also not detectable from the outside.
How long does the processing take?
Once your ECU is received, processing usually takes place within 24 hours. For shipments from Switzerland, processing time is typically 24 to 72 hours.
Can I use the optimized software on public roads?
The software deviates from the stock configuration. Use is permitted exclusively on closed terrain or racetracks.