Chain/Sprocket replacement

[Mustang]

miltons bike has keihin carbs yours has mikunis .............there in lies the difference in mpg , mikunis are thirsty dogs especially at 70 mph and up
on the wifes 95 , I took it for a 325 mile trip once by myself and was slab riding at 100 mph + ...............had to fill the tank 3 times  :shock:

[D-Fuzz]

That explains things.  I admit my bike is a little less thirsty since I set up the carbs according to your recommendations, but at 80mph+ it is still thirsty.  Oh well, that's the price of having fun, I guess. :D