KTM 690 Duke AUS/UK 2014 Owner's Manual page 190

23 SUBSTANCES
Guideline
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Only use unleaded super fuel that matches or is equivalent to the specified fuel grade.
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Fuel with an ethanol content of up to 10 % (E10 fuel) is safe to use.
Info
Do not use fuel containing methanol (e. g. M15, M85, M100) or more than 10 % ethanol (e. g. E15, E25, E85, E100).
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