aRacer RC Mini XX - Yamaha Zuma 125 (2016-2020)

The aRacer RC Mini XX is here, and it's the biggest jump the Mini line has ever taken. This is a full standalone ECU for the 2nd-gen 2016-2020 Yamaha Zuma 125 (BWSR125) — not a piggyback. It completely removes your stock ECU and hands you full control over how your scoot runs, tuned entirely from your phone.

The Mini XX runs aRacer's new X-TUNE app platform over a built-in Wi-Fi connection, so you're monitoring engine vitals and making changes in real time without a laptop or an external controller. Under the hood, a new 4-core MCU makes it roughly 25% faster than the outgoing Mini X, a redesigned GaN power supply runs ~50% more efficiently for more stable delivery, and a new 360-degree antenna pushes Wi-Fi signal strength up over 200% (5dB) versus the previous generation. It's also eBoost-capable for motor-power control on supported setups.

Whether you're throwing on a big bore, upgrading injectors, or just want to clean up how your Zuma runs, the Mini XX gives you the headroom to actually tune it right.

Key Features:

• Full standalone ECU — complete stock replacement, no piggyback
• 100% plug-and-play, no harness modifications required
• New X-TUNE app platform with built-in Wi-Fi + phone control
• 4-core MCU, ~25% faster processing than Mini X
• Redesigned GaN power supply, ~50% more efficient
• 360-degree Wi-Fi antenna, 200%+ signal strength
• eBoost capability on supported models
• OTA updates + unique ECU ID for online feature unlocking
• CNC aluminum heat sink housing

Important — Burn / Activation:
Each Mini XX requires a quick burn process to load the correct base map for your bike's year, model, and mods. Your box includes an app activation code card — do not lose it (replacement runs $100 through aRacer).