So...can someone help me figure out predict what happened with my bike?

to start. i have a honda shadow 1100. recently did some carb work myself its the second time i did it. i noticed the intake is a little rotten. i might need to get a new hose or two for the intake because it really isnt long enough. so..i went for a ride today. came home, left the bike out for like 3 hours. went... show more to start. i have a honda shadow 1100.
recently did some carb work myself its the second time i did it.
i noticed the intake is a little rotten. i might need to get a new hose or two for the intake because it really isnt long enough.

so..i went for a ride today. came home, left the bike out for like 3 hours. went back out with carb clean and sprayed down some old fuel. i recently replaced the seals on the carbs.
i turned the bike on, and BOOM. sounded like a gunshot.
and after that, my light, which used to only have the two options off or highbeams now has low beams and high beams with no off button?
so i took it for a quick spin
now one of the engine blocks sounds different..
now once it gets into higher RPM it sounds more like...idk a roar mixed with a motorcycle rather than just a motorcycle.
when i got back, i turned it off, cleaned some more gunk off the heart of the bike and tried to turn it back on only to find. my battery is dead..

battery is now charging.

what went wrong? any ideas on where to start?
Update: the irony is the bike was working better than usual this week
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