Riding style - Generally with traffic during the commute, occasionally WOT when I get pissed and stuck behind someone. The bike is usually in the 3-7k rpm range, rarely above.
It could very well be carbon build-up. It seems to run hotter and mileage has dramatically decreased, used to be 30-36, now its 20-25. Plugs looked pretty good though, no scorching or broken.
There isn't any emissions being a Texas bike.