I love my loud pipes and personally I think cruisers suit loud pipes. Welcome to the noise lol

Very interesting about the dyno run.

I'd say keep it slightly lean. It really doesnt matter on such a low tuned low powered engine. You would only ever cause any damage if you were redlining it for hundreds of miles, even then i suspect it would be ok.

Sports bikes need rejetting as they are much more highly strung

The rejet was dyno-tuned to be on the lean side. That was with the quiet baffles screwed on, which created more back pressure. With them off now, it'll be even leaner. I'm toying with the idea of a K&N filter and another rejet.