Polini ECU for Yamaha T-Max 530i maxi-scooters from 2012 to 2016. This ECU engine control unit is the most advanced adjustable piece of equipment that was manufactured by Polini for injection four-stroke engines to date. The ECU unit checks the amount of fuel that is introduced into the cylinder based on the injection timing. The settings are adjusted via an interface on a laptop. The ECU is simply connected using the corresponding wire to the injection nozzle and additionally connected to ground and the positive battery terminal.