QJMotor SRK 921RR ECU TUNING (2024-2026)

2024–2026 QJMotor SRT 921RR ECU Tuning & Remapping

The QJMotor SRT 921RR combines a high-performance four-cylinder engine with modern electronic engine management, giving the platform considerable potential for improvement through professional ECU calibration.

At Lukos Engineering, we offer professional ECU tuning, ECU flashing, dyno testing and full custom motorcycle dyno calibration for the 2024–2026 QJMotor SRT 921RR.

Our tuning is developed using live engine data, wideband AFR monitoring and controlled testing on our dedicated in-house eddy-current braked motorcycle dyno. The objective is not simply to chase a peak horsepower figure, but to improve power delivery, throttle response, fueling and overall rideability throughout the operating range.

What Can QJMotor SRT 921RR ECU Tuning Improve?

Modern motorcycles are heavily controlled by their ECU. Fueling, ignition timing, electronic throttle operation and numerous torque and engine-management strategies all influence how the motorcycle responds to the rider.

Factory calibration must also account for emissions legislation, noise regulations and different operating conditions across global markets.

Professional ECU calibration can improve areas such as:

• Throttle response
• Low and mid-range torque delivery
• High-RPM performance
• Power delivery throughout the rev range
• Fueling accuracy
• Air-fuel ratio under load
• Throttle transition behaviour
• Engine smoothness
• Performance after exhaust modifications
• Overall rideability

The result is a motorcycle that can feel stronger, smoother and more responsive rather than simply producing a higher peak dyno number.

Tuning After Exhaust & Decat Modifications

Changing the exhaust system can significantly alter how an engine breathes, particularly when the catalytic converter is removed or a complete performance exhaust system is installed.

The original ECU calibration was developed around the standard exhaust configuration. Once the exhaust flow characteristics change, the fueling and other calibration strategies may no longer be optimal for the new setup.

Custom ECU tuning allows us to analyse the motorcycle under load and calibrate it around its actual hardware.

This is particularly beneficial for SRT 921RR models fitted with:

• Decat exhaust systems
• Full exhaust systems
• Performance silencers
• High-flow air filters
• Intake modifications
• Combined intake and exhaust upgrades

ECU Flash – Send-In ECU Service

Our send-in ECU flashing service is available for customers who cannot bring the complete motorcycle to our workshop.

Simply remove the ECU and send it directly to Lukos Engineering. We can then install our developed calibration before returning the ECU ready to refit.

This service can be suitable for standard motorcycles as well as common exhaust and intake configurations.

For more extensively modified motorcycles, a full custom dyno tune provides the greatest opportunity to optimise the calibration around the individual bike.

Dyno & AFR Check

We offer dyno and AFR testing for owners who want to establish exactly how their QJMotor is currently performing.

The motorcycle is tested under controlled load while we monitor its air-fuel ratio and power delivery.

This service is particularly useful if:

• The motorcycle has an aftermarket exhaust
• The catalytic converter has been removed
• The ECU has previously been flashed
• The motorcycle has been tuned elsewhere
• The existing calibration is unknown
• You want to verify fueling before further modifications
• You want accurate before-and-after dyno testing

Full Custom Dyno Tune

For the most comprehensive calibration, we offer full custom dyno tuning on our dedicated motorcycle dyno.

Rather than simply loading a generic calibration, we test the individual motorcycle under controlled conditions while analysing live data and AFR.

This allows the calibration to be refined around the actual motorcycle, its modifications and its behaviour under load.

A full custom tune is particularly suitable for:

• Full exhaust systems
• Decat systems
• Performance air filters
• Intake modifications
• Track-focused motorcycles
• Multiple engine modifications
• Previously tuned motorcycles requiring correction
• Owners wanting the most refined calibration possible

More Than Peak Horsepower

Peak horsepower is only one part of a properly calibrated motorcycle.

A motorcycle can gain relatively little at the absolute peak while making substantial improvements through the middle of the rev range. These improvements can have a much greater effect on how quickly and smoothly the motorcycle accelerates in real-world riding.

Our calibration process therefore focuses on the complete power curve, AFR, throttle behaviour and engine response rather than concentrating exclusively on the highest number displayed on the dyno.

Why Choose Lukos Engineering?

Lukos Engineering specialises in professional motorcycle ECU calibration using a dedicated in-house eddy-current braked motorcycle dyno.

Our tuning process is based around controlled testing, live engine data and wideband AFR measurement. This allows calibration changes to be tested and verified rather than relying solely on generic files or theoretical adjustments.

Whether the motorcycle is completely standard, fitted with a decat or running a complete intake and exhaust package, the calibration can be developed around the actual specification of the bike.

Suitable For

This tuning service is suitable for:

• QJMotor SRT 921RR 2024
• QJMotor SRT 921RR 2025
• QJMotor SRT 921RR 2026
• Standard motorcycles
• Decat exhaust systems
• Aftermarket silencers
• Full exhaust systems
• Performance air filters
• Intake modifications
• Road motorcycles
• Track-focused motorcycles
• Previously tuned motorcycles requiring optimisation

QJMotor SRT 921RR ECU Tuning

For 2024–2026 QJMotor SRT 921RR ECU tuning, ECU remapping, ECU flashing and custom dyno calibration, Lukos Engineering provides a data-driven tuning service focused on improving performance, fueling, throttle response and overall rideability.