Just go ahead and adjust. If it is too lean on the low end it will not transtion well. Play with it on the ground and you will see what I mean. Mine has been adjusted and it still barely has the "gurgle". You will be amazed at how much the engine idle will increase as you lean it out. I did this with the cowling off just messing around. Only ran it for short periods of time, constantly checked the cylinder temp with my temp gun. I could tell when it was too lean by the transition and head temp. Just had to know......