E15 is currently available at about 250 of the nation’s 160,000 or so service stations, but the EPA wants to make E15 available at up to 1,700 stations by the end of 2017.
The spread of E15 will increase the risk of misfueling with E15, which no motorcycle is designed to ingest. Running your bike on E15 may cause your engine to run hot and could possibly damage your bike’s catalytic convertor as well as cause crud buildup on your valves and pistons. Manufacturers are so worried about the effects of E15 that they say using it will void your warranty.
Ethanol has also been proven to wreak havoc on the fuel systems on older bikes. It’ll melt fuel lines, gum up petcocks, and clog carburetors. Increased ethanol content also means gas will go stale quicker—sometimes in as little in two weeks.