![m109r ecu flash m109r ecu flash](https://dragonmotorbikes.co.uk/wp-content/uploads/2018/08/INc68Zz-1024x576.png)
![m109r ecu flash m109r ecu flash](https://www.woolichracing.com/images/products/woolich-racing-suzuki-bench-harness-type-2.jpg)
This is because Chip tuning is all done downstream of the ECU, intercepting inputs to and outputs from the ECU, so the ECU has no idea what is happening within the engine.
![m109r ecu flash m109r ecu flash](https://www.woolichracing.com/images/products/woolich-racing-suzuki-harness-type-2c-extension.jpg)
This is because Chip tuning is all done downstream of the ECU, intercepting inputs to and outputs from the ECU, so the ECU has no idea what is happening within the engine.