Anyone out there able to tell me how to tell if spark plug looks to lean? Anywhere on the net with a pic of a plug that is to lean?? just changed pipe to white brothers e series , got a k&n and drilled 6 1/2 inch holes in breather lid. trying to figure if i am running too lean ? Ran about an 1hr 15min on the plug .The beast idles good , drives good, and runs awesome .

 

It should look slightly tan to white. If it looks white like brand new it is probably too lean.

Steve Lubecki

 

one side of the plug is a slight brownish light greyand slightly white colour and the other side is a greyish black colour if that helps any

 

Click here for plug color chart.

 

thanx for the help and it gave me an idea of what they are to look like. But i still have no idea if mine is lean or not cause non of the pics look like my plug. One side of the plug is grey to light black while the other side is whitish tan grey??? if anyone can help me a little more that would be appreciated!

 

I see you are running the 500,your plug should be more on the greyish side,a four stroke is a little different than the 2 stroke.