TIRE PRESSURE, AIR FILTER, HOW YOU RIDING STYLE(HEAVY HAND) AND BRAND OF GAS CAN LOTS OF ACCESSORIES AND EVEN RIDER WIEGHT ALSO EFFECT FUEL MILAGE.
MY FUEL MILLAGE HAS BEEN AS LOW AS 28MPG.:mad:
SINCE USING TUNE ECU I HAVE RAISED MY MPG TO 42, WITHOUT CHANGING MY RIDING STYLE.:D