Hi guys,

Tried to find some information on dealing with high altitude but couldn't find anything so apologies if I've missed it.

We're currently on 2 '07 XT660R's and have made it to Kashgar having crossed the 3750m Torugart pass. The bikes aren't liking the altitude too much and tend to stall in 1st gear. We're slightly concerned as tomorrow we're heading for the Kunjerab Pass which at 4755m is a full km higher.

We're both running Metal Mule exhausts (one newer with the lamda on it and the other without - we bought the O2 sensor from someone on this forum.) and long ago followed the instructions on here to make the bike run richer.

My question is, what should we be doing to help the engine deal with the altitude?

Any help much appreciated!