You are looking at maintenance info for the previous generation of bikes. A '15 doesn't have a separate gear box and the alternator is internal to the engine -- no belts to change, etc.
Dealer maintenace is expensive, partly because labor costs and partly because they will always replace wear items where an owner might re-use them. Example: valve cover gasket sets are expensive. I have a spare set just in case I ever need one. So far that has never happened. A dealer, on the other hand, will always replace them.
is my unofficial
checklist for 6K and 12K services. Fluid changes, air filter change, oil filter change, and spark plug changes are necessary when using the stock parts. If using iridium spark plugs you can go longer than 12K.
I use any oil that meets BMW specs. This stuff
doesn't cost an arm and a leg.
is the oil filter I use. If in doubt that it will fit your bike buy one from your local dealer.
I get the recommended FD fluid from the dealer. They sell in in a 7 oz bottle.
I usually get an air filter from the dealer, too.
You want to check your valves, if for no other reason that to see where they are so you have a baseline to compare against future measurements to tell how fast they are wearing. I've not yet had to change a valve shim.
documents the first 12K service I did on my '13 GS. It may give you a rough idea of what needs to be done.