The screw on the left side of the picture is the highspeed needle. Turn it clockwise to make the mixture leaner.

The screw on the right side of pic is I don't know what.

The screw on the other side of the carb is the low speed mixture. Turn it clockwise to make the mixture leaner.


Here is a goood post on how to tune your motor.





[link]http://www.rcuniverse.com/forum/m_3734570/tm.htm[/link]