Hi Guy and Marie,
I have also bought a 1200GSA to replace my old 100 GS, ans I am also planning a long trip in Africa for end of this year on this bike. Like Frank said , its to early to tell what the specific needs are for the 1200GSA, but as the mechanics of the A is exactly the same as on the 12GS, go and look around on the HUBB for there are a lot of techn experience related to the 1200 GS. Expect the adv is stroger than the 12GS for offroad...
Having been all over the world (by the way your country is great , was there a year ago!) and being an experienced engine engineer I would NOT advice to take NORMAL MAINTENANCE PARTS with you, as those are available all over the world; or at least you can PLAN your maintenance stops and have them send over. Eg. an engine filter needs to be change every 10.000 km, but engine will not suffer if you change it only at 20.000 km.... Same for the brake pads and others. You can PLAN this without any problem based on experience of your dealer. Take ONLY a small amount of general items (srews, bolts, nuts, fixingwire, coldwelding kit, adhesive, glue etc not exceeding 0,5 kg all together: see further). They will help you to face UNEXPECTED SITUATIONS. An engien filetr will not ...
Concerning other parts out of the list eg. levers, the GSA has levers with knots, so they will not brake completely if the bikes falls havily but just about 2/3 cm from the end, so you can just drive further. this means : dont forget the bike is well designed by BMW, BETTER than the 1200GS. So the trottle cable on a new bike will last at least a RTW trip ...
But tubes and 10 spokes (each type) are certainly things to be adviced on a heavy loaded bike. Dont forget the tires are tubeless.
Grab into the partlist of some submarket suppliers (Touratech, but expect very long delivery) to increase the basic protection of the GSA. Dont go for all, just think what can brake if the bikes falls down. Otherwise you will overload (see further) , compare with stories about GS1200.
Check out the weights. Dont overload. You can buy anything basic (clothes, food) all over the world. Why should you take 4 pairs of bluejeans with you. They are much cheaper anywhere in Africa.
The max weight for the GSA is 475 kg. The bike weights dry 256. So payload is 219 kg. If you intend off road driving dont go beyond this payload. Overload is more than half the causes of break downs. So your best insurance is not overlading
gas and oil = 35 kg
you both I assume = 145 kg
This leave you with only 40 kg !!! of luggage paniers included.
This is not much. But you can always addapt your trip planning and avoid long offroads. Most world roads are paved.
I have driven my old GS 100 completely standard (plastic paniers by the way), never have taken any spares with me, but I had bulbs and little bits (see above) and at least 2 tire repair kits and a PUMP and pressure gauges and a very small amounts of tools above the original bike one. Just to help you drive out of the bush, back to town where some people can make miracles with nothing.
I had a breakdown in 1973 in the middle of Congo (halfway between Kamina and Kolwezi) with my old 1959 DKW Munga in the middel of no where on a pist. Lesser than 1 hr later a local truck had offered help. The solidarity of people in bad conditions is always much higher than you would expect.
Means: expect sitting in the rain for hours on a crowded motorway in EU, but a guy with a loaded mule will stop in the atlas mountains ...
By the way, what is your trip planning ? dDeparting from Israël Asia or Africa first.
CU on the road