Have a Saito .91 mounted in my Revolver 70 and did not have to change anything. But, I am finishing up a Hangar 9 Christen Eagle II and the throttle arm was on the opposite side of the throttle rod and servo. Thus, I just rotated the carb 180 degrees as others have recommended.

At first I was a little nervous about rotating the carb, as I have never rotated a carb on a four stroke before, but after looking at it, found that it is a very simple procedure.

Just go for it. It is very simple. Can say that now that I have done it !