Following up. Just received my Vstrom1000 back in the States from Brazil.
It was definitely the ethanol that was causing the problem. I lost everything from 3-4000 RPM.
With US gas everything is now fine although ethanol damage to my 3rd fuel filter left me stranded on the side of the road today.
I think Vstrom riders should be aware that Brazilian fuels poses some difficulties. Also all riders should beware of plastic fuel filters being destroyed by ethanol gasoline.
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