Why my engine doesn’t start is one of most common question , maybe because of the reasons can be hundreds .

Here we leave out the mechanical causes and that do not concern the ECU .

This flow diagrams can help You to follow a logic sequence , and understand ( hopefully ) the reason why Your engine doesn’t start .

GENERIC DIAGRAM : Valid for most applications

SPECIAL CASE : If You are installing a Supersport 300 KIT , steps are little bit different because parts of the KIT are well defined ( in the most common case You miss the correct Engine Calibration ) .