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ARacer RCmini X Engine Management System ECU will completely replace the OEM ECU on the 2022+ Honda Grom 125!

This is not a piggyback ECU, the RCmini X completely removes the OEM ECU!

This will eliminate all of the issues that would occur with the OEM ECU, giving you full control of how the engine will run without any worries of random changes that typically occurs with a piggyback ECU.

Adjustments could be made with a smartphone/tablet via Wifi. The RCmini X is 100% plug and play, no wiring needed!

Monitor all your engine vitals on your smartphone!

See below for RC Mini X hardware and software features!


ARacer RCmini X is a Complete engine management system that allows you to make all adjustments via wifi to your smartphone/tablet. Pair this up with the correct fuel injector size and you could easily tune your engine to run.

Tuning could be done on a dyno (highly recommended) or safely on a backroad/street using a wideband o2 gauge and sensor with the autotune function.

Optional AF2 option is available and recommended to be used with the RCmini X to have the ECU Auto-Tune.

RC Mini X ECU Hardware Features:

A quicker 4-core MCU computing speed processor (200% increase!)

Built-in wifi connectivity with 360-degree antenna (20% connection strength)

Redesigned external wiring which allows direct connection to AF2 module and/or quick-shifter

RC Mini X ECU Software Features:

FREE APP DOWNLOAD! No longer required to pay $16 for the Aracer Smart App

Improved AutoTune fuel adjustments and feedback with the use of the AF2

Each ECU has an exclusive ID, which the users can pay by credit card online to unlock special add-on options

WiFi connection allows for Laptop or SmartPhone connection

QuickBurn (Flash) is shortened by 200% (less than 60 seconds)

RC Mini X Function Features:

TCS traction function

The original factory is not equipped with TCS, and it can be easily started in the rainy and slippery state after it is turned on

The original factory is equipped with TCS, which can provide 3 stages adjustable

3rd segment original narrowband O2 sensor fuel correction

Adjustable fuel injection timing

Response Button power response MAP adjustment → After the upgrade, open and hide the 3 target air-fuel & ignition angle diagrams

Guided idle speed setting

Guided quick discharge trigger pressure setting

New style Backfire/Idle loop control

New analysis tools

RCmini X ECU

Brand-new 4-core MCU, the computing speed is increased by 200%

20x17 (RPM x TPS%) fuel adjustment

20x9 (RPM x TPS%) ignition angle adjustment (pay to open another 2 MAP)

Manifold Air Pressure base for inlet air amount calculation

Environment temp and Baro compensation available

Increase Rev Limit. Pit Limit.

Increase almost 10% above power after calibration (depend on engine model)

Easy plugin (remove stock ECU and install RC1 ECU without any harness modified)

Same connector as stock ECU

RCmini 5 ECU meet IP67 specs

Support Auto-Tune with aRacer AF2 wideband sensor module

Built-in Wi-Fi and 360-degree antenna design (no additional wiring required), the connection signal strength is increased by 20%

Aracer RCMini X

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