Join Date: Feb 2017
Location: Denver, Colorado
I'll chip in too, since I had the bike up at 12,698 feet this weekend...
I'll second the observation that there's no need to mess with anything for the elevation, although as previously mentioned, you'll notice a slight power loss with the altitude.
If you're coming down to the South West, and plan on taking any back roads, I'd recommend bringing an extra pre-oiled air filter with you on your trip - it's usually so dusty that your air filter can get clogged pretty fast, and that will really reduce your power. (I spent the weekend up on the passes, and I was shocked at how dirty my air filter got over the course of only five days on those dusty roads).
Have a good trip and drop a line when you pass through Denver!