What temprature does the 206 like to run at? What is the best way to adjust temprature on this motor? Is it through adjusting the needle in the carb? Does the idle mix screw matter? Also, when running a temp gauge on the spark plug and the washer on the spark plug am I sacrificing anything by having the plug sit up higher in the head?
You are giving away a small bit of compression with the temp sensor, not much. Your best adjustments will be in needle height to change the mixture. There is no “ideal” temp, tune for the day and whatever makes the best laptimes! Check out Faster Motors for the carb tuning tools you will need. Float height gauge and jet tool will make life a lot easier!