Does seem to sound like a battery issue then. What's the voltage across the two terminals when the battery has rested overnight? Try measuring it at different ambient temperatures too. It's not an ideal test, but it'll give you some idea whether you've got a sulfate problem and/or a partially shorted cell.
What oil you got in the bike? If it's too viscous it will affect cold cranking to some degree.
Quote:
Originally Posted by
mlok2000
I tried and failed to get into diagnostic mode (will double check and try again).
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Unfortunately there is no diagnostic function built into the Tenere's dash (unlike X/R models). You need to buy a plug in diagnostic tool to do any testing. They cost around �80.