Of some relevancy is this excerpt from MCN.
UK is now introducing E10 fuel (previously was E5) and this has raised discussions there. It is a bit of a long read ................
Yamaha and Triumph both said that all models from 1990-on are compatible with E10, while Honda said everything post-1993 is compatible, although carburettor-equipped models could experience poor driveability in cold weather.
BMW said that all their models regardless of the year of manufacture can run on E10 fuel with no adverse effects.
Suzuki models made after 2002 are compatible with E10 and those made after 1992 might be but owners should seek advice.
Ducati said that their Multistrada 620 and 1000 models were not compatible with E10 fuel, with tanks known to expand or leak in markets with ethanol-rich fuel.
And Kawasaki said that models made from 2006-on would be ok on E10 but advised customers not to use the fuel in bikes that weren’t specifically approved.
Piaggio (who own Moto Guzzi and Aprilia) were the least E10-friendly manufacturer in 2012, saying that all motorbikes built before 2011 would not be compatible with the fuel.
The (British) Government has calculated that vehicles using E10 fuel emit approximately 2% less CO2 than those running on E5 (the current UK standard fuel).
There can be unwanted side effects when using fuel with a higher ethanol content, especially for those with older bikes. Ethanol can damage plastic or fibreglass fuel tanks, cause old rubber hoses or inlet manifolds to swell or split and react with zinc, lead and aluminium components, too.
Ethanol is also hygroscopic, meaning that it absorbs moisture from the air around it, and this can cause problems when fuel is left to rest in tanks for long periods.