Ninja 300

My Ninja 300 motorcycle without ABS After two hours of being turned off, it does not turn on, to light it must roll it until I turn on, I tried the gasoline of the gasoline has 39 psi, I did cleaning to the tank Filters of gasoline and air, check spark plugs, cleaning of injectors, I should clarify that after it turns out it works perfect until it cools completely, who can help me, how do I do the error codes? THANK YOU ...