Ethanol Gasoline and Fuel-Injected Bikes

| 8/9/2019 9:59:00 AM

Motorcycle Classics tech expert Keith Fellenstein
Editor’s note: If you’re having trouble with that old Suzuki, BSA or BMW, Keith Fellenstein is your guy. From motorcycle tuning tips to detailed motorcycle engine repair, he can draw from a wealth of experience to help guide you to success. Send questions to: Keith’s Garage, Motorcycle Classics, 1503 SW 42nd St., Topeka, KS 66609, or send an email with “Keith’s Garage” as the subject.

Q: I enjoy reading your column every month and I turn to you with a question. Are fuel-injected bikes less affected by the ravages of ethanol gasoline than bikes with carburetors?

- Robert Lazzaro
Hopewell Junction, New York

A: The short answer is no, ethanol affects fuel-injected bikes too, but in different ways. The fuel still seems to go bad faster than pure gasoline, and will still draw moisture out of the air. Most fuel-injected bikes are going to have a fuel pump, which can get gummed up and seize. I suppose the injector nozzles could crust over too, but would hope the injector pressure would overcome that. My routine for
carbureted bikes is to turn off the taps on the way home and try to enter my garage on fumes to help keep the carburetor bowls clean. Since you can’t do that with a fuel-injected bike your best bet would be using a fuel stabilizer additive. MC

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