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Honda LEAD 125 ECU
7 ECUs for the Honda LEAD 125 in the BikeStudio database.
Also known as: Lead 125 eSP, Lead 125 K12, Lead 125 K2T
| ECU part number | Years | cc | Market |
| 30400-K2TK-T51 | 2026 | 125 | Thailand |
| 30400-K2TG-T21 | 2025 | 125 | Thailand |
| 30400-K2TA-T02 | 2022 | 125 | Thailand |
| 30400-K12H-931 | 2015–2017 | 108 | Vietnam |
| 30400-K12K-V11 | – | 125 | Vietnam |
| 30400-K12M-J61 | – | 125 | Asia |
| 30400-K12M-V91 | – | 125 | Vietnam |
For workshops: diagnostics, fault codes and remap data
Fuel-injection workshops use this data with the BikeStudio diagnostic tools: HDiag Pro for Honda PGM-FI and YDIAG Pro for Yamaha read live sensor data (RPM, TPS, engine temperature, O2), read and clear fault codes (DTC / blinking MIL) and HDiag Pro also reads and writes Honda ECU flash for remapping (an ECU tuner with 2D/3D maps). The AFR Meter helps tuning and ECU remapping with the live air-fuel ratio on the phone. Part number, ECM ID, calibration and flash size in the database help pick the right remap file.
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.