Advanced Programmable ECU Control for the Honda Grom 125 2021+
The aRacer RC Super XX PRO ECU for the Honda Grom 125 2021+ is a full-replacement programmable engine control system developed for riders, builders, race teams, and professional tuners who need greater control than the factory ECU provides.
Designed for modified and competition-focused builds, the RC Super XX PRO provides advanced access to fuel delivery, ignition timing, engine response, tuning data, and supported aRacer accessories. It gives experienced users a flexible ECU platform for dyno calibration, track development, engine modifications, and other performance applications.
What It Is
The RC Super XX PRO replaces the original ECU on supported 2021-and-newer Honda Grom 125 models. Compared with the more compact RC Mini XX platform, the Super XX PRO is intended for builds requiring a broader performance ecosystem, expanded accessory support, and more advanced calibration capability.
Key Features
- Full-replacement programmable ECU for supported Honda Grom 125 models
- Advanced fuel-delivery and ignition-timing control
- Greater tuning flexibility than the factory ECU
- Supports data-driven dyno testing and calibration development
- Designed for modified engines and performance-focused builds
- Compatible with supported aRacer displays, wideband modules, controls, and communication accessories
- Suitable for race, track, testing, research, and development applications where permitted
Vehicle Fitment
Honda Grom 125: 2021+
Fitment note: Model-year designations, electrical systems, ECU connectors, and wiring configurations can vary by market. Confirm the exact motorcycle model, production year, market version, ECU connector, wiring harness, and supported software configuration before ordering or installing this product.
Product Information
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Product: aRacer RC Super XX PRO ECU
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Application: Honda Grom 125
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Year range: 2021+
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SKU: PA-B302100DB
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Product type: Full-replacement programmable ECU
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ECU platform: RC Super XX PRO
Recommended Applications
The RC Super XX PRO is intended for experienced users who need a programmable ECU platform for applications such as:
- Dyno tuning and custom calibration
- Modified intake and exhaust systems
- Big-bore and internal engine modifications
- Mini-moto racing and track development
- Data collection, testing, and research
- Performance builds that exceed the capabilities of the factory ECU
Professional installation and calibration by an experienced aRacer dealer or qualified tuner are strongly recommended, particularly for motorcycles with substantial engine, fuel-system, or electrical modifications.
Recommended Accessories
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aRacer AF3 Wideband AFR Module – provides wideband air-fuel-ratio monitoring for calibration and diagnostic work
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aRacer PRO-LINK USB Communication Adapter – supports ECU communication and calibration access from a compatible computer
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aRacer DG2 Multi-Function Display Gauge – displays supported real-time ECU and vehicle data
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aRacer Race Panel 2 – provides a larger display and monitoring interface for supported racing applications
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aRacer R Button – provides supported ECU function control where compatible
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aRacer QSR V2 Quick Shift Race V2 – enables supported quick-shift integration when correctly configured
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aRacer cable splitters and extension harnesses – support compatible accessory installations and wiring layouts
Accessory compatibility can depend on the ECU configuration, motorcycle wiring, software version, and installation requirements. Confirm compatibility before ordering.
Why Choose the RC Super XX PRO?
The 2021-and-newer Honda Grom is a popular platform for street-performance projects, mini-moto racing, engine development, and custom builds. As modifications become more extensive, the factory ECU can limit a tuner’s ability to calibrate fuel delivery, ignition behavior, and supporting systems properly.
The aRacer RC Super XX PRO provides a more capable foundation for advanced builds. Its programmable ECU architecture, supported accessory ecosystem, and calibration flexibility allow professional tuners and experienced builders to develop a setup around the motorcycle’s actual engine configuration and intended use.
North American Support
- Supported by aRacer ECU R&D of America LLC
- U.S.-based technical and product support
- North American platform validation and development
- Domestic shipping from California when inventory is available
Competition Use Notice
Some aRacer products are intended for closed-course competition, off-road operation, testing, research, or development use only where applicable. Installation or use on pollution-controlled vehicles may be restricted by local, state, or federal law. The purchaser and installer are responsible for determining product suitability and complying with all applicable laws and regulations.
Image Notice
Product images may show a visually similar ECU or an example installation from another application. Part numbers, serial numbers, connectors, labels, or accessories shown in an image might not correspond exactly to the product supplied. Refer to the listed SKU and confirmed vehicle application when ordering.
California Proposition 65 Warning
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit
www.P65Warnings.ca.gov.
