I think the bike may have got warm at a stop light and it started to sound weird to me. Was this the bike dropping to one cylinder to help cool it off? It was like a constant put-put-put sound instead of the normal Harley sound. It went away with a slight twist of the throttle but would come right back. I got the bike to do it again when I got home and let it idle in the garage for a minute. It got to about 77* out today, so not really too hot out. I'm hoping this isn't anything bad, I only have 740 miles on the bike.