First I would get your battery tested to make sure it’s good. Any auto parts store or bike shop should be able to test it for you.
If the battery tests good(10.5v showing on multi meter I doubt the battery is good) I would next check to insure everything is grounded properly.
If you’re not burning up fuses, I wouldn’t imagine you have a short somewhere.
Also, check the voltage at all the fuses. If they are all reading 10.5 or there abouts, the issue is definitely your battery.
That’s my 2cents