Originally Posted by MUS
. The CT90 will get close to 90 mpg, so you could jet them pretty rich in order to handle the higher elevations
Air is thinner at high elevations so SMALLER jets are needed to keep the same air/fuel ratio. Carry spare spark plugs just in case you foul a few up high.
I've got a trail 90. I hope your seats are better than stock. Sounds like a fun trip even if you don't make it all the way.