Anyone have experience with a Grom at high altitude?

I live at 8,500ft and would like to cross a pass that is up at 12,000ft. This is not an everyday thing, and the speed limit is low on the road anyway (though it's a fun road and i would pull off to let faster drivers pass).

Has anyone gone over this type of pass on a grom? Driver weight only 160. but we're talking less than 50% power up there.

Also if anyone have any gas mileage numbers at high elevation i would appreciate it, usually it's not too different on FI vehicles, but if the power-weight slips out of acceptable you can get some poor numbers.

 

No grom experience but it's fuel injected so it should run fine, just down on power like everything at high altitude. And I can't see economy getting worse, less air will mean less fuel to maintain the same air/fuel ratio.

 

Less air also means less power, which means higher throttle to make it up hills and to get to speed. Often it balances out, but, as i said, if it falls out of acceptable power for its own weight, it can suffer poor mpg.