I just got done totally rebuilding a 2014 kx450f I mean all new everything on the inside of the motor. But now the bike won’t start on its own. But it will start with starting fluid and then it stays running untill you shut it off. Could my fuel pump be going out or could my ECU be bad? Iv had different people tell me different things. Bike also has a bit of a misfire when your trying to keep the throttle locked at a certain point. This is my first fuel injected dirtbike and I’m not sure what to check first and or how to check it. I put a lot of money into this bike and I just want it to run right.