Yes, I do know what you mean. It DOES NOT sound like a V twin. The ghosting at idle is less than a 1/4". There is no ghosting at full advance. From Duane A. "How much error is too much? That is up to you. We found little, if any, improvement if the two marks are brought together from only 1/4" apart. .... The final indicator is the "F" mark. If it is good and the "S" is a bit out, forget about it. It is one of those things in life. " Sounds like I have "one of those things in life." I am too brutal with a hammer, and frankly too afraid, to try the fix idle ghost. I will take the advice of forgetting about it, particularly given the close proximity of the ghost (less than a 1/4" (maybe 1/8) and both s marks well within the window). Thanks for the link and advice.