Originally Posted by Billy T.

There are 2 major things that need to be looked at when setting up a throttle servo. You need to make sure that the linkage from the servo to the carb is in an absolute straight line. You do not want any angles from the servo to the carb. The other thing to check is that the endpoints are set. You need to check that the carb is not trying to be opened past the physical limit of the carb. The same goes for when the carb is being held closed. If these things are all set the same, you should have no issues.