Bone stock 2009 Ex 250, with the exception of a yoshi slipon with baffle installed and a change in gearing from 14 45 to 15 45. First tank was 54 mpg, 2nd tank was 67, 3rd tank i have no numbers for yet but should by weeks end. Hoping for70 mpg on a fairly regular basis without body mods. Planned mods include additional timing, larger rear tire, possibly radialsrather than the bias plyson it now, k and n air filter, synthetic lube, clipons to force me to ride in a more aero position.