Of have no experience of this bike, but as a member of the Fazer Owners Club (FOC UK), I have seen numerous threads on that site referring to the 7K exup fault. I f I recall correctly, you would have to refit all of the missing parts and then reset (ie zero) the servo motor. It also has to be spotlessly clean and completely free to rotate. You may wish to have a look on there for the FZS1000 Fazer 7K exup fault code