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For the love of MINI Bikes


ARacer RCmini5 Engine Management System ECU will completely replace the OEM ECU on the Honda Grom / Monkey125 2014-2020 OG and SF Grom


This is not a piggyback ECU, the RCmini 5 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 Bluetooth. The RCmini 5 is 100% plug and play, no wiring needed! Monitor all your engine vitals on your phone.


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 DG1 and AF1 combo option is available and recommended to be used with the RCmini 5 to monitor A/F ratio.


3D Fuel and Injection tuning

3D Ignition timing tuning.

Manifold Air Pressure base for inlet air amount calculation

Environment temp and Baro compensation available

Increase Rev 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 AF1 wideband sensor module on

ARacer RCmini 5 Engine Management ECU for Honda Grom / Monkey 125cc (2014-2020)

SKU: ASG-1038


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