don't,
its fraught with problems, * take the engine out as a whole.
use 10mm rod through the front and rear engine mounts to give you a pair of lifting handles, remove cam cover and drain plug, plus inner and outer gearbox covers
* to take the head off in situ, you have to remove the studs from the crankcase, most come out by "double nutting" and all will loosen by doing the same, but a few of them clash with the frame tube, when you try to remove them, and in order to get them out you have to strip all the coils and electrics off the front of the frame, then lift the head with the awkward studs loose, and tilt it to the left, to then remove the dangling studs, it works OK, you need a helper realy, but can easily damage the threads in the crankcase, if they are all good and possibly factory fitted LEAVE THEM IN PLACE, they are never as good as factory fitted, plenty have to deal with that though, (Timecerts is my own choice) but since you say you are going to remove the bottom end? why bother, take the lump out and you will be safer. then the hassle of the chain becomes a doddle, you can remove it whenever you choose and fit it last, after the head and barrels are back on, just sit the motor on it four gearbox mounts, and thread the chain through using some gas welding rods as fishers.
CLEM