That's what I'm running. Problem is, my plug looks dry and burnt every time I check it. Just what kind of conditions should it be in order to have an accurate reading? Idle? Should I gun it before checking it? Tried three different tanks of gas, three different octanes and the results the same. I add oil to the mix by the capful until I check the plug and it eventually shows a little oil on it. But seems like I can't achieve the Goldilocks ratio. Just goes from bone dry to sopping wet.
This spark plug color chart will help you determine if your motorized bicycle engine is running too cold or rich, or too hot or lean. Simply compare the color of your spark plug with those shown on the chart below. Click the Download button for a...