Al Smith
Mac Daddy
They had been doing some improvement on the carbs from what info I recall seeing on another site . What it actually was I have not a clue .Most likely something to do with the compensating portion of the carb which detects decreased flow though the air filter . I'm clueless about how that actually works .My last 200T that I bought last summer was noticably stronger than my other two as well. Maybe they tweaked the porting or improved the carb or something in the last year.