Mine is a 2011. It has now 153 k kms on the clock but in reality it has done somewhat less. Its ridiciously overgeared OEM so I have changed the rear sprocket from 45 to 48 and now ride with a 47.
Anyhow - problems started at around 70 k kms. Suddenly fuel consumption went from 25 kms/l without thinking about riding slow to 20 kms/l. And to this day spending huge amount of cash on technical checks, top end rebuilds etc the fuel milage is still 20 kms/l riding 80-90 km/h max. And this is not right at all. A 650 cc efi bike should have a fuel consumotion something like 25-28 kms/l if its ridden moderately. And the low output Teneres should probably have less. Mine had 27-28 kms/l km when it was new.
Oil consumption started around 50 k kms, and has increased since. Its not uncommon for certain bikes, the problem with the Tenere is that it still uses oil after a recent top end rebuild. I have had numerous problems with oil leaks too. Some have ben easy to fix, some not. For a time I had a oil leak and none could even find out where it came from. But its not there for the moment although Im sure it will come back one sunny day...

Valve checks - they are supposed to be done every 20 k kms, mine has been done and Im always told they are way out of specs.

Its a clear myth that the Teneres are reliable. Every time I meet or hear of a Tenere I hear about all the problems they have had. I rode with a german guy in Australia and his rectifier died. His cush rubber drives worn out after less than 10 k kms. An australian guy in northern Argentina spend heaps of money on a rebuild and repair and travelled by bus to Santiago Chile to get spare parts. When done he rode 2-300 kms on it and it broke down again. He had to truck it to nearest shipping town and ship it back home to Australia. Not exactly what you had expected on a RTW trip?
I know a couple of guys back home with Teneres. One of them blew up his engine after 50-55 k kms after numerous problems before that. He had a long case going with the local Yamaha dealer who refused to replace anything under warranty as he had added the Kev mod on his bike. He wasnt very happy about that and rides a KTM today.

Adding that the Teneres are very heavy, in fact the very heaviest single cylinder bike except the very ancient mk2 of Suzukis old Dr800 and that the engine is set up so lean that it requires adjustmenst that void the warranty - dont even think about it.

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In the end everything will be fine. If its not fine its not the end....