alcohol is bad for a couple of reasons.drag racers have run the stuff for years, but you need to run about 40% more alcohol thru the motor to get the same stoich ratio. that's why your fuel/econ. goes down on e10/e20/e-85 vs. gas. alcohol also eats rubber fuel lines and pump seals,washes the oil off the cylinder walls and dilutes the oil because it gets past the rings.
for the boaters, if your boat has a built-in tank make sure it's NOT a fiberglass tank because alcohol will eat the resin and turn it to mush which ends up in your jets/injectors.
i don't buy the e10/e20 b.s. each gal has less gas by vol. BUT you get less mpg so you use more gals.
'04 Honda 919, Candy apple red met., 17/44t sprockets,f-16 windscreen,delkevic ss exhaust,Tharbars,givi engine bars, billet alum. led turns w/ running lights,red adj.levers from china, bar end mirrors,grip heaters,adj. foot peg brackets,adj. bar risers,dunlop Q2(that are better than your pp 2ct,lol)bike wired for gps and phone charger