Hello, I have a Kawasaki KXF 450 f cross motorcycle and it is an injection. It does not want to go on, but it is always close to it. It has already been done: – a new piston and – a cylinder – a new spark plug – new gasoline The petrol runs into the injection engine. Ignition spark is also there. The valve play is also ok. What else is it? Could it also be on the throttle valve sensor? Thank you