No, jetting is not the only thing.... If you're sparing no expense and want to run alcohol, then buy a carb made for alcohol.... There are a lot of mods on the circuits in the carb, too.... AED, Quick Fuel, Barry Grant are just a few of the companies that sell them.... We run on E-90 using a carb build by Vindicator....works great and has for about 3 years now.