A few days ago I went with my AT into the mountains of Lesotho. The higher I got, the more my AT started to stutter. It felt like sometimes some of the sparkplugs didn't spark at all. I took out the sparkplugs, which were all black with char.
I suspect the engine is not getting enough oxygin at higher altitudes, because my bike is used to Dutch altitudes (=sealevel)therefor burning too much purely petrol.
Could this be the cause? What can I do to fix it? I really need a permanemt solutiona as I plan to travel through Etheopia later on this year...