Kawasaki Z 900 from 2025 - FLAWLESS ECU Performance Flash

Kawasaki Z 900 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 for model years 2025 and newer. We adjust the injection, ignition, lambda control, and throttle valve characteristics – this results in approximately 3 hp more power, 5 Nm more torque, and noticeably smoother power delivery, without any 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 control unit is neither opened nor damaged.

We tune each software individually to your motorcycle and the hardware actually installed. Optionally, this can be combined with the FLAWLESS Power Mapswitch, a lowered fan temperature, removal of the Vmax limiter, deactivation of the immobilizer, and an individually configured fuel cut-off for pops & bangs.

Kawasaki Z 900: Comparison of stock vs. optimized software

Performance increase 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 bike.

Depending on the setup, this allows us to achieve an output increase of approx. +3 hp as well as around +5 Nm of torque.

In addition to pure power gains, we primarily improve the power delivery. The Z 900 accelerates more smoothly and consistently and responds more directly to throttle inputs overall.

The Z 900's typical constant throttle jerk is also significantly reduced or eliminated by the optimized maps.

Optimized injection and AFR values of the Kawasaki Z 900

As part of the Kawasaki Z 900 ECU tuning, we also adjust the injection maps. This ensures that the Air-Fuel Ratio (AFR) values of your Z 900 are in an optimized range 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 reduces thermal strain 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 switch between different mappings using the riding modes of your 2025+ Kawasaki Z 900.

For example, you can keep the stock mapping in one riding mode and use the full FLAWLESS ECU Performance Flash in others – with or without pop & bangs.

Optimizing the Kawasaki Z 900 fan temperature

Upon request, we can lower both the switch-on and switch-off temperatures of the fans by approx. 4 °C each.

This allows active cooling to start earlier and run longer. Your Z 900 will remain in the optimal temperature window more reliably, even during very sporty 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 remove this top-speed limit so that acceleration does not cut off prematurely.

Deactivating the Kawasaki Z 900 immobilizer

Are you using your Z 900 on the racetrack? Upon request, we can deactivate the immobilizer.

This allows your bike to be started without an ignition key – convenient if the machine has been modified for track use.

Pops & Bangs and exhaust overrun on the Kawasaki Z 900

We adjust the fuel cut-off of your Kawasaki Z 900 individually to your preferences and installed setup – from subtle exhaust popping to clearly audible pops & bangs.

You can also program the pops & bangs to specific riding modes in the configurator.

Important: For setups with a catalytic converter, only subtle overrun popping is possible. Please specify when ordering whether your Z 900 is equipped with a catalytic converter so we can adjust the configuration accordingly.

Individual tuning for your setup

Every software optimization for the Kawasaki Z 900 is tailored to your motorcycle's specific hardware. Please provide the following information in the comment field when ordering:

• installed slip-on 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 of your Kawasaki Z 900 to your motorcycle.

Suitable performance parts for your Kawasaki Z 900

Exhaust systems and air filters, in particular, influence optimal map tuning. You can find suitable parts in our following categories:

• Exhaust systems from Akrapovic, LeoVince, and MIVV
• Sport 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 discuss which combination is best for your setup before you place your order.

What hardware is required for maximum performance?

To achieve the stated performance increase on the Z 900, the following are mandatory:

• an aftermarket slip-on 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 specified power gain cannot be fully realized. The other features of the optimization – drivability, AFR values, map switch, fan temperature, Vmax limiter, immobilizer, and fuel cut-off – are available to you regardless.

How the software optimization of your Kawasaki Z 900 works

1. Configure – Order your FLAWLESS ECU Performance Flash and select the desired options.
2. Send in control unit – Remove the ECU from your Kawasaki Z 900 and send it to us securely packaged and insured.
3. Programming – Upon arrival, your control unit is usually processed by our technicians within 24 hours. For shipments from Switzerland, the processing time is typically 24 to 72 hours.
4. Install and ride – We send your control unit back to you. Connect it, install it, and you're ready to go.

No additional hardware necessary

No additional control unit is installed on the motorcycle for the software optimization. Your original ECU is programmed by us. The control unit is not opened or damaged 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 map individually – we do not use purchased ready-made files.

The basis for this is created on our own high-performance simulation dynamometer. Every setup variant – from the stock configuration to combinations of various sports exhaust systems, sports air filters, and configurations with and without a catalytic converter – is installed and specifically tuned during development. Our maps are therefore based on real measured values and not on empirical values 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 (full power version, 91 kW) model years 2025 and newer

Do you ride the restricted 70 kW version or another model? You can find further optimizations for Kawasaki in our Kawasaki Naked category.

Your benefits

• Individually tailored to your setup