Issues running at altitude/cold
I need some help figuring out why my 2017 AT is running like **** at altitude.
Basically on passes over 4000 meters (13000 ft) the engine will stumble and run poorly. At first it seemed like it would only happen when cold but getting up to 5000 M it would have issues even hot.
It stumbles and coughs almost as if it is running way too lean (opposite of what I would expect) and can’t rev above 5K rpm even in neutral.
I am riding with a friend on a 2018 ATAS and he has no issues.
Today it seemed fine climbing the mountain and started having issues only after I shut the bike off for a couple minutes. But this time instead of disappearing as it warmed up the problem continued until I got below 4000 meters.
I checked the air filter and valves already, and ruling out bad gas as my friend didn’t have an issue