Very reliable bike. Only known weakness is the gearbox splines wear but easily checked but a pain to repair. Home servicing is not complicated. Running costs are much cheaper than a modern GS.
Overall the bike is very stable on the road in a corner thanks to the geometry and telelever. Power delivery is very linear with no surprises. It can carry luggage for 2 for short trips or keep up with the modern bikes in an intermediate session track day such is the depth of ability of this bike. It comes into its own as a fast sports tourer. That is what it is build to do and it does it well.
For a city bike it is not the best choice. The dry clutch and air/oil cooled design of the engine is not really suitable for day in day out city riding. Definitely not in the height of summer.
There a 4 different R1100S models to choose from.
R1100S - Stock bike, grey springs on the Showa suspension, 170 section rear tyre.
R1100S Sport - Stock bike, taller suspension with yellow springs, 180 section rear tyre. Last production run of the 11S was R1100S Sport models only.
R1100S Randy Mamola - White and blue checkered paint job, RM signature, carbon engine tappet covers, Laser exhaust (race exhaust optional) with chip for the fueling, carbon belly pan, white dials, same as the R1100S Sport otherwise. Collectible, single spark and dual spark engines. Single spark RM models rare as hens teeth. Limited production.
R1100S Boxercup - taller Showa suspension with yellow springs (this bike is as tall as a GS), Red, white and blue BMW paint job, carbon belly pan, carbon engine tappet covers, Laser exhaust (race exhaust optional) with chip for the fueling, white dials, GS handlebar mounted mirrors. Collectible. Not a limited no production. You could order one from BMW.
All of the above could be ordered with luggage, tool kit, tyre repair kit. 2002/2003 the single spark engine was changed to a duel spark engine. It also received a bit of a makeover with a different handle bar layout with a headlight that is always on in line with the new regulations. Different colours etc. The last year saw some new metallic colours added to the options, metallic blue and maroon.
Loads of mods available, Taller screens, plusher seats, exhausts, suspension from reputable companies, carbon wheels, after market bellypans, Lennies carbon intake (worthwhile mod with a air filter and exhaust), PC111 USB (rare find nowadays, should get one if you have fitted the exhaust and inlet), gear indicator from buzzzz, shorter telelever, custom headstock (very expensive but beautiful), 1150 engine mod, and some other bits and pieces form a company that used to race the bikes.
The place to go is either Boxertrix (UK) or pelican parts (more US based) but both sites very knowledgeable about the bikes.
Mine is for sale but not if it is going to used as a city bike.
) they handled well enough to get the pots on the deck and grind away the covers 
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