~TABASCO~
RIDE ON ADV is what I do !
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That idle behavior does not look to be a problem. The momentary RPM dip seen at the end seems to be due to the additional load applied to the electrical system when the fan kicked on.
Im always down to learn and find new ways on how to fix things.... In this situation, I've worked on a zillion Tenere bikes and have NEVER seen this RPM drop before. If this is actually an electrical issue I would really like to learn how this happens and how to fix it for the future. Ive had guys that have had WAY to much electric "stuff" on there bikes and its been way overboard, and I still have NEVER seen anything like that. I admit, just because Ive not seen it doesn't mean it cant happen..... LOL