I read recently that the ethanol in the high RON fuel makes seals and so forth perish. Don't know the veracity of that though.
There are lots of issues with motorbikes, especially in Europe with the high ethanol unleaded, there are even issues with tanks leaking.
@lynx started
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I read recently that the ethanol in the high RON fuel makes seals and so forth perish. Don't know the veracity of that though.