Where are you located? If you have a newer buggy using the DC volt CDI than the stock CDI will be the best since the mapping of the timing is set up for the heavier buggy the performance CDI's are all designed for the much lighter scooter. AC volt CDI were another story since all were designed around the scooter even the ones that come in the buggy.The hot coil will do nothing over the stock coil. If you were using the stock carb I would say a 122 jet but you are using a larger carb which may hurt your performance. Unless you have the test equipment for A/F mixture you will need to do a full throttle run. You will need 600-900 ft strait somewhat level road. From a dead stop go full throttle for 600-900 ft. With throttle at full throttle cut ignition off keeping full throttle until engine stops than pull over , pull plug and check color. It is important this is done just as I say, full throttle. If you coast for just a few seconds at closed throttle your test will show color of main and idle circuit. You do not want the idle circuit to come into play for you only want results of the main circuit which is at full throttle. You want the plug to be a tan to brown in color. Do not use a new plug for this test use an old already colored plug.
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