of course the noise is coming from the engine
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you need to clean your carbs
you need to bench sync them
you need to complete your timing and advance check. you only said you 'think its ok'
its either right or it isnt.
you need to set your cam chain tension....cant do this till your carbs are done and you have the bike running reasonably well.
when all is done....THEN, you can do a vacuum sync of the carbs. Its truly amazing how an accurate vacuum sync can quiet an engine.
...and if its STILL NOISY after all that....you have earned the right to complain .
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is my day off, and im going for a ride
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