Remove the pulley on the exup at the exhaust and take the cables off it.
Does the servo still click and 7k show on the rev counter?
If so remove the cables from the servo motor.
Test it again, if it still shows 7k change the serve motor if not change the cables
Does the servo still click and 7k show on the rev counter?
If so remove the cables from the servo motor.
Test it again, if it still shows 7k change the serve motor if not change the cables