My 2001 Yamaha R1 has an issue. I put the key in and turn it on, everything lights up fine, but when I press the start button nothing happens.

If you push the starter button and hear a click the starter button is good. If you do not hear a click, put power to the two skinny solenoid activation wires(+ and -), if you hear a click now you have a bad starter button. Clean or replace the switch. Follow the positive battery cable to the solenoid, short across the battery power cable and the starter power cable. If the starter works you need a new solenoid. If you tap on the starter with a plastic hammer while holding the starter button, and it works, you need new starter brushes.If you take the starter apart and the coils are burnt or the armature is shorted you need a new starter.