If it was wiring, might not be a good idea.
Good points!A good battery voltage directly across the terminals should be 12.6-12.8 with the bike off. 12.4 to 12.5 although doesn’t seem like much is a sign of a battery that’s not really 100%. If the bike is very hot then the fan will kick in and you’ll see the voltage drop while it runs. But it should come back up when the bike is just sitting.