I agree with Tom. I have installed many new plugs and I always check the gap, but I have never had to re gap any of them. Find your short problem before even thinking about the plug.
If your main 20 amp fuse only blows when you press the start button, the problem has to be from the start button on out.
I misspoke on some part locations above. The igniter is behind the dash on the far left (kick stand side) with eight wires to it. The starter circuit relay is next to it with four wires. If you disconnect the plugs to both the relay and the igniter and the fuse still blows when you press the start button with the key on, there is a short in the yellow/red wire running from the starter button to the relay and the igniter.
If it doesn't blow, reconnect the relay and press the button. If the fuse then blows, the problem is in the black wire from the starter circuit relay to the main starter relay or inside the main relay. Disconnect the main starter relay to determine if it is the wire or the relay.
Last edited by GoMotor; 07-29-2019 at 11:33 PM.