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Kawasaki Z 900 70kW from 2025 - FLAWLESS ECU Performance Flash
Kawasaki Z 900 70 kW Tuning from 2025 – what the Performance Flash achieves
The FLAWLESS ECU Performance Flash replaces the stock software in the original engine control unit of the Kawasaki Z 900 70 kW for model years 2025 and newer. We adjust the injection, ignition, lambda control, and throttle valve mapping, resulting in around 30 hp more power, 10 to 12 Nm more torque, and a noticeably smoother power delivery, all without additional hardware on the motorcycle.
Unlike piggyback modules or auxiliary control units, we intervene directly in the stock software. The optimization remains invisible from the outside, and the ECU is neither opened nor damaged.
We customize each software individually to your motorcycle and the hardware actually installed. Upon request, it can be combined with the FLAWLESS Power Mapswitch, our quickshifter retrofit, lowered fan temperatures, removal of the Vmax limiter, deactivation of the immobilizer, and a custom-configured fuel cut-off for "pops & bangs."
Kawasaki Z 900 70 kW: Stock vs. Optimized Software Comparison
| Feature | Stock 70 kW | with FLAWLESS ECU Performance Flash |
|---|---|---|
| Peak Power | 70 kW (95 hp) at 8,000 rpm | approx. +30 hp |
| Torque | 91 Nm at 6,500 rpm | approx. +10 to +12 Nm |
| Power Delivery | Stock maps | significantly smoother and more consistent |
| Constant throttle jerkiness | present | significantly reduced or eliminated |
| AFR values | Stock maps | optimized for the respective setup |
| Mappings | fixed stock map | individually controllable via KTRC levels |
| Quickshifter and Blipper | not present | retrofitting possible in the original ECU |
| Fan temperature | Stock thresholds | switch-on/off points each approx. 4 °C lower |
| Top speed | electronically limited | Vmax limiter removed upon request |
| Immobilizer | active, start only with ignition key | deactivated upon request |
| Fuel cut-off | Stock characteristic | individually configurable |
| Additional hardware on the bike | – | not required |
Performance upgrade for the Kawasaki Z 900
We write the tuning software individually for your Kawasaki Z 900 and adapt the maps to the hardware installed on your motorcycle.
Depending on the setup, this allows us to achieve a power increase of approximately +30 hp and around +10 to +12 Nm of torque.
Beyond just raw power, we primarily improve the power delivery. The Z 900 accelerates more smoothly and consistently and reacts more directly to throttle inputs overall.
The typical constant throttle jerkiness of the Z 900 is also significantly reduced or eliminated by the optimized maps.
Optimized injection and AFR values for the Kawasaki Z 900
As part of the Kawasaki Z 900 ECU tuning, we also adjust the injection maps. This ensures the Air-Fuel Ratio (AFR) values of your Z 900 remain in a range optimized for your specific setup.
In addition to improved drivability, this can also reduce thermal stress. The adjusted mixture preparation results in lower exhaust temperatures, which relieves thermal load on components such as the exhaust valves and cylinder heads.
FLAWLESS Power Mapswitch for the Kawasaki Z 900
With the optional FLAWLESS Power Mapswitch, you can toggle between two mappings using the KTRC levels of your 2025+ Kawasaki Z 900.
On the restricted KTRC levels, the A2 power output is maintained, while on the open KTRC levels, you have the full FLAWLESS ECU Performance Flash with unrestricted power at your disposal.
This gives you direct access to both characteristics using your Z 900's stock controls—no extra switches or modifications required. Switching occurs while stationary at 0 km/h.
KTRC level configuration
As of 2025, the 70-kW version of the Z 900 no longer features riding modes. Therefore, we use the KTRC levels for switching. The configuration could look like this, for example:
| KTRC Level | Mapping |
|---|---|
| KTRC OFF | open – FLAWLESS Performance Flash - Pops & Bangs |
| KTRC Level 1 | open – FLAWLESS Performance Flash - Pops & Bangs |
| KTRC Level 2 | open – FLAWLESS Performance Flash - no Pops & Bangs |
| KTRC Level 3 | restricted – A2 power - Stock mapping |
You determine which of the two mappings is active by selecting the KTRC level.
Quickshifter and Blipper retrofitting
Upon request, we can program a quickshifter and blipper directly into the original ECU of your Kawasaki Z 900—enabling clutchless up- and downshifting without any additional control units on the motorcycle.
Simply select the option in the configurator, and we will supply the appropriate sensor. The sensor connects easily to the existing connector on the wiring harness—plug it in, install the ECU, and ride.
Optimizing the Kawasaki Z 900 fan temperature
Upon request, we can lower both the switch-on and switch-off temperatures of the cooling fan by approximately 4 °C each.
This ensures active cooling starts sooner and runs longer. Your Z 900 will stay more reliably within its optimal temperature window, even during aggressive riding, high ambient temperatures, or in city traffic.
Removing the Kawasaki Z 900 Vmax limiter
The top speed of your Z 900 is electronically limited as standard.
Upon request, we can remove this top-speed limit so that acceleration does not cut off prematurely.
Deactivating the Kawasaki Z 900 immobilizer
Do you use your Z 900 on the racetrack? Upon request, we can deactivate the immobilizer.
This allows your motorcycle to be started without an ignition key—very practical if the bike has been modified for track use.
Pops & Bangs and overrun burbles on the Kawasaki Z 900
We adapt the fuel cut-off of your Kawasaki Z 900 individually to your preferences and the installed setup—ranging from subtle overrun burbles to clearly audible pops & bangs.
You can also program the pops & bangs to occur only on specific KTRC levels via the configurator.
Important: With a setup including a catalytic converter, only overrun burbles are possible. Please indicate during your order if a catalytic converter is installed on your Z 900, and we will adjust the configuration accordingly.
Individual tuning for your setup
Every software optimization for the Kawasaki Z 900 is tuned to your motorcycle's specific hardware. Please provide the following information in the comments field when placing your order:
- Installed slip-on muffler or exhaust system, e.g., LeoVince, Bodis, Remus, Austin Racing, Arrow, or Akrapovic
- Installed air filter, e.g., K&N, BMC, or Rade Garage
- Catalytic converter present: yes or no
- Other relevant modifications
This allows us to optimally tune the mapping for your Kawasaki Z 900.
Suitable performance parts for your Kawasaki Z 900
Exhaust systems and air filters in particular influence the optimal map tuning. You can find suitable parts in our categories:
- Exhaust systems from Akrapovic, LeoVince, and MIVV
- Sports air filters from K&N and MWR; BMC or Rade Garage filters are also suitable.
Systems from Bodis, Remus, Austin Racing, or Arrow are also suitable. We are happy to clarify which combination best suits your setup before you place your order.
What hardware is required for maximum performance?
To achieve the stated performance increase, the following is mandatory for the Z 900:
- An aftermarket slip-on muffler or sports exhaust, e.g., from Bodis, Remus, Austin Racing, Arrow, or Akrapovic
- A sports air filter, e.g., from K&N or BMC
Without these components, the stated power increase cannot be fully realized. The other features of the optimization—drivability, AFR values, mapswitch, quickshifter, fan temperature, Vmax limit, immobilizer, and fuel cut-off—are available regardless.
How the software optimization for your Kawasaki Z 900 works
- Configure – Order your FLAWLESS ECU Performance Flash and select your desired options.
- Send in the ECU – Remove the ECU from your Kawasaki Z 900 and send it to us well-packaged and insured.
- Programming – Upon arrival, your control unit is typically processed by our technicians within 24 hours. For shipments from Switzerland, the processing time is usually 24 to 72 hours.
- Install and ride – We send your control unit back to you. Connect, install, and you're ready to go.
No additional hardware necessary
No additional control units are installed on the motorcycle for the software optimization. Your stock ECU is programmed by us. The control unit is not opened or damaged in the process and remains unchanged from the outside.
Why FLAWLESS Industries?
We have been developing our software optimizations in-house for over 5 years and write every mapping individually—we do not use pre-purchased files.
The basis for this is created on our own high-performance simulation dyno. Every setup variant—from the stock configuration to combinations of various sports exhaust systems, sports air filters, and configurations with and without catalytic converters—is physically installed and specifically tuned during development. Our maps are therefore based on real measured values, not on estimates or copied files.
We process well over 1,000 control units 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 suits your motorcycle and intended use.
Suitable for
- Kawasaki Z 900 70 kW model years 2025 and newer
Do you ride a different model? You can find further optimizations for Kawasaki in our Kawasaki Naked category.
Your benefits
- Software individually tuned to your setup
- Approx. +30 hp power increase
- Approx. +10 to +12 Nm more torque
- Smoother and more consistent power delivery
- Eliminated constant throttle jerkiness
- Optimized injection maps and AFR values
- Lower exhaust temperatures, thermal relief for exhaust valves and cylinder heads
- Optional: FLAWLESS Power Mapswitch with A2 power switchable via KTRC levels
- Optional: Quickshifter and blipper retrofitting in the original ECU
- Optional: Lowered fan switch-on and switch-off temperature
- Optional: Removed Vmax limiter
- Optional: Deactivated immobilizer for track use
- Optional: Pops & Bangs or overrun burbles switchable via KTRC levels
- Processing usually within 24 hours
- No additional control units required on the bike
Usage notice
The FLAWLESS ECU Performance Flash alters the engine management software from stock factory settings. Its use is permitted exclusively on closed circuits or racetracks.
Frequently asked questions about Kawasaki Z 900 optimization
How much power does the Kawasaki Z 900 tuning provide?
Depending on the hardware installed, we achieve approximately +30 hp and +10 to +12 Nm more torque. At least as noticeable is the smoother power delivery and the elimination of constant throttle jerkiness.
Is the restricted power maintained?
Yes, with the FLAWLESS Power Mapswitch. On a KTRC mode of your choosing, the restricted A2 power remains available, while on another mode, the Performance Flash with open power is enabled.
Can I retrofit a quickshifter?
Yes. We program the quickshifter and blipper directly into your original ECU; no additional control unit is necessary. You only need a compatible sensor—which you can order from us as well.
Why is the fan temperature lowered?
We lower the switch-on and switch-off temperatures of the fan by about 4 °C each. Active cooling begins earlier and runs longer, which provides thermal relief to the engine during aggressive riding and high outside temperatures.
Can the Vmax limiter be removed?
Yes. Upon request, we remove the top-speed limit of your Z 900 so that acceleration doesn't cut off prematurely.
Can the immobilizer be deactivated?
Yes. For track use, we can deactivate the immobilizer upon request, allowing the motorcycle to be started without an ignition key.
Is the software tuned to my exhaust system?
Yes. We take into account the installed slip-on muffler, air filter, catalytic converter, and other relevant modifications during tuning. Please provide these details in the comments field of your order.
Does the optimization work with a catalytic converter?
Yes. The power increase and optimized injection maps work even with a catalytic converter. However, with a catalytic converter, only overrun burbles are possible for the fuel cut-off, not pops & bangs.
Do I need a sports exhaust or sports air filter for the optimization?
For the stated power increase, yes—an aftermarket slip-on muffler and a sports air filter are required for the Z 900. Other optimization features are available even with stock hardware.
Does the control unit 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 processing take?
After your ECU arrives, processing usually takes within 24 hours. For shipments from Switzerland, the processing time is typically 24 to 72 hours.
Is the optimization suitable for all Z 900 70 kW models from 2025?
Yes. This software optimization is intended specifically for the 70 kW restricted Kawasaki Z 900 of the 2025 model years and newer.
Am I allowed to drive with the optimized software in traffic?
The software deviates from stock settings. Its use is permitted exclusively on closed circuits or racetracks.