[Juan]

Hi, I want to make a speeduino ecu for my yamaha r125 from 2008 but as simple as possible. I want to keep spark timing as is and just add timing to the inyection, it is a single cylinder 125cc that has a tps and a crank sensor, nothing more so if I can keep it this simple then great. Thanks for any help.

[PSIG]

Have fun! BTW, additional sensors provide additional capability or functions. The extra sensors are there for (usually) good reasons, and are considered 'minimal' for typical operation already. I would assess if the loss of related functions is worth deleting them. It's your project and goals, so the choices are always yours.