Hi there!

To check your settings, screw both needles in untill they are seated and back them out 2 full turns. This will ensure that you are rich enough for easy starts, and you will be rich enough on the top end that you will have to lean it out a bit for max RPM.

Once you find the correct needle settings for your engine/prop/exhaust combination, you will find that you rarley, if ever, need to adjust it. Lovley engine!