Now that your engine is properly broken in we can start to tune it for better performance.  It is important to have a baseline to go back to while tuning your car.  Most engine manufacturers' baseline settings consist of adjusting the screws (low, mid, high) flush with the housing.  To keep things simple we will only be tuning using the high speed needle and the low speed screw.  Just to be safe we will not touch the mid range screw, make sure it is flush with the housing.

1. Fire up the engine and run the car around a little bit to get it warmed up (if it's not already warm).

   Considering all adjustments are at their factory default setting we will begin with leaning out the the mixture using the high speed needle.  There is a range in how far you should turn the needle during a tuning session, some manufacturers claim 1/8 of a turn, others say 1/12- and other recommend 1/16.  Please consult your engines manual for the proper increments.

2. Turn the high speed needle 1/X of a turn to the right to lean it out, and make a couple of runs.
3. Continue with step 2 until you are satisfied in how the engine / car is running.  You will get a feel for how it should perform, and most importantly, you will want to make sure you see smoke coming out of the muffler throughout the entire throttle range.  No smoke= too lean = seized engine.

   After getting it setup with the high speed needle it is time to adjust the low speed needle.  The reason we started with the high speed needle, is because it directly affects the low speed adjustment.  Leaning out the mixture with the high speed, automatically leans out the mixture from a low speed perspective.

4. Do a 3 or 4 high speed runs then bring it back to you.
5. Wait approximately 15 seconds then give it full throttle. It should jump at first, then sputter, then take off- this is the desired state.  If this happens, you are all set, if not, proceed to step 6.
6. Low speed idle screw adjustments:

• If it dies before 15 seconds it is too rich- lean it out.
• If it doesn't die after 20 seconds it is too lean, make it richer
• If within the 10 to 20 second mark you give if full throttle and the rpms drop causing it to stall, it is too rich, lean it out.
• If within the 10 to 20 second mark you give if full throttle and it takes off without hesitating (after it first jumps) it is too lean, make it richer.