OK start the buggy and let it warm up, than drive say for a 1/4 mile or equivilent. Try to limit idle time except for warm up In other words drive it than bring to shop garage ect. as quickly as possible than shut it down. Pull your plug and observe. What color is the rim, porcelin insulator, ground tip. Note along with color, if black, is it shiiney or chalky. Connect plug to plug wire, ground the plug body to the engine not frame, have somebody spin the engine over and note the color of the spark, should be bright blue and consistent with rotation of engine. Put your plug back in the engine, start and run engine while spraying carb cleaner or starting fluid on and around intake, pay attention to the idle. Is there any change. You will have to regulate the pressure of the spray so that the overspray is not sucked in the filter for this will give you a false reading. I would also check your valve clearance for .003 Intake and .005 exhaust. This has to be done on a cold engine. If out of adjustment note which way either too tight or too loose if out. Post all the info you get from your results. This should give us enough info to eliminate certain areas and put us in the right dirrection.
Tom
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