Some 1000 owners seem to get over 50mpg which can be as many as 200 or more miles per tank. I tend to get around 150-160 maximum per tank which works out at around 43mpg. So your figure is not unusual. My Vee definitely runs rich which probably accounts for the poor mpg and I hope to get it re-tuned over the winter to improve things. If it bothers you find a dealer with a Yoshimura R-421 fuel injection adjusting box (sometimes called a Yoshi box) to adjust the fueling for you which should improve things.