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ECU B3W0 — Yamaha Mio Gear 125
ECU part number B3W0 for the Yamaha Mio Gear 125 (Gear 125 / Mio Gear) 2022–2024, 125 cc, OEM ECU. Pinout and full ECU data in the BikeStudio Partner app.

ECU data
- ECU part number
- B3W0
- Motorcycle
- Yamaha Mio Gear 125
- Other names
- Gear 125, Mio Gear
- Years
- 2022–2024
- Engine
- 125 cc
- Bore × stroke
- 52.4 x 57.9 mm
- Power
- 9.4 hp
- ECU maker
- OEM
- MCU type
- RL78
- Market
- Asia
Pinout and full data in the app
The ECU pinout picture, ECM ID, calibration and flash size for this ECU are in BikeStudio Partner — the free app for motorcycle workshops, which also works offline.
Get it on Google Play Download on the App Store
Other ECUs for the Yamaha Mio Gear 125
| ECU part number | Years | cc | Market |
| B3W1 | 2022–2026 | 125 | Asia |