I hear time and again poor gas mileage and short tire life. If the maintenance is up to par ,like Waspie mentioned maybe you check your driving style. I just checked my last tankful and realized 64mpg--10% city and the rest doing between 35 -65 mph. I have friends tell me what poor fuel mileage they get. But after riding with them for about five minutes the answer is obvious. Bad driving habitsin in almost all cases. Driving habits relates to tire and brake wear also.