How bad is the F650GS. I am considering one for my RTW trip. Having rode one I find it more refined than most singles and lighter than the twins. Kind of middle ground.
What sells this bike to me is its economy. Find it hard to justify a trip round the world on a bike with economy of 50mpg when the GS is capable of 75mpg. I want to see the world by causing as little damage as possible. On the other hand I dont want a bike giving me hell which is why I am tempted by Honda.

From my research preperation for the GS involves...
replacing of head and wheel bearings with quality items
changing oil return hose to allow easy water pump access
stronger sub frame and side stand bolts
quality hose clips
good radiator protection (especially where it meets the frame)
high quality MX fork seals

Annoying maintenance issues...
fuel regulator / filter
valves require a lot of parts to be removed for access (a good thing as it means you check the bike more thoroughly)
head bearings require a special tool
have to drain an oil tank (can be done without removing as stated in manual)

Problems I am aware of and can plan for...
Ignition trigger fails and takes weeks to source (carry spare)
Fuel pump failures (buy assembly from a breakers, take only the pump)
Water pump (carry spare, replace every 20k)
Shims (check sizes before departure, carry spares)

I have read forums and there do seem to be 'electrical issues', most of which seem to be caused by loose connections to the battery. A GS911 will help with fault diagnosis.

I have read many trip reports and people seem to expect their BMW to perform perfectly. Are the problems related to naive BMW owners. There seems to be a definitive split, those who entrust BMW dealers with maintenance and the people who perform their own. I have never heard of an Engine failure, 100,000 miles seems possible.

I would prefer an Africa Twin to a F650GS. Being environmentlly conscious is important to me (also good for the soul), so.....

How Bad is a Well Maintained F650GS.