Tate......I am wondering if there is something diff with the F models. I had a new in 1976 750F and it got only 28 to 30 mpg from day one. I just purchesd a 1975 750F WITH 15K. Went thru it and with stock jets and settings it gets 28 to 3o mpg also. I sure would like to get alittle better mpg...