yes I have seen you ride pictures... u have a beautiful machine
will you be riding with a pillion rider (I mean two persons on bike) I recommend one person per bike for such a massive tour.
From Quaetta to naran you can take you bike in stock condition no problem ... but take a extra sprocket set of 15front X 55rear to get high torque for insane climbs or your bike will choke, keep a couple of extra tubes, the stock tyre is very less grippy in off roads (specially wet off roads which is the case ahead untill khunjrab)
dont mess or tweak engine its in perfect health as your bike is brand new it can take all the resistance no problem... your real fight would be with water, slippery tyre, punctures, and loads and loads of power on high climbs ...
remember even with stock sprocket set you can make it to khunjerab... even I have seen a scooter trip to khunjerab .. but you will enjoy like hell with sprocket altered to torquee set up.... bike will dance on its hoves on climbs with smile.
Hope it helps.