Veter, here is an excellent picture from JVB, in thread on fast idle
, showing how the throttle cables can be unseated at the Bowden box below fuel tank.
The same can happen to other end of cables and is actually more likely
. This area could have been touched during the service.
This is the end at the throttle body - sometimes the little ferrule pops out. Picture from R1200GS.info thread on throttle body adjustment
Best of luck with your bike! Robert.