Tight chains are noisy. Make sure you didn’t overtighten it. I always set mine to the far loose side of spec. Chains seem to last longer that way.
So here's a curious one. Last weekend I tightened up the chain, cleaned and lubed it all up. Took the bike for a test ride and it sounded like something was rubbing around the chain or sprocket. It didn't affect performance at all but it just sounded odd. Not sure if the brake pads are a little off or what it might be. The chain/wheel is all aligned correctly. I squirted some extra chain oil around the front and rear sprocket but still this sound persists. Should I be concerned?
+1 on tight chain being noisy. Also, don't forget to set the chain tension on the side stand, not the center stand.