Mine is 1997 cbr900rr.

There is no problem when I make cold start with my cbr900rr.

But, it doesn't respond at all when engine is hot, for example I drive my cbr, stop it for fuel, and press start button, but it doesn't start at all with no sign, no response from the start motor.
10~20 minutes later, however it starts fine without any problem when engine's temperature is cool down.

So, I replaced it with new starter motor, new solenoid(starter relay), and new connector, but my cbr responses same, which means my cbr doesn't start(no reponse from the start motor) when it is hot.

Abnormal Condition:
When engine is hot, my cbr doesn't respond at all with start motor, even there is no "Click" sound at solenoid(starter relay) when I press the start button, while the other electrical components like horn, lights, winkers work normal.
Is there a fail safe like a sensor to shut down the start motor?

Please help!
Jean

 

A common issue on Honda's is that the Engine Stop switch contacts become dirty as well as the Starter Switch contacts. It's not too difficult to take it apart and clean those contacts.

 

Yeah, most likely culprits are start/stop switch or start-button.

Measure output-voltage at these switches when it's hot and acting up. Finding junction where power disappears shows problem is between that point and last junction that did have power.