Jams229, I could not send you a private message. Error was "your mailbox is full, delete some messages". Here is the reply to your private message. Jams229, I apologize for the confusion. Yes, you count from the top or blunt end of the needle. Thus, as you move the clip from the #4 to the #5 notch you raise the tapered needle higher in relation to the constant diameter of the Needle jet. This allows more fuel to flow into the engine causing a richer fuel/air mixture upon combustion. Be prepared to go to the next size larger Pilot jet. Don't get discouraged. Working on jetting builds character.