I've been contemplating measuring my squish and running my head to a machinist. Might have to do the cylinder, who knows - never done it before. You think the S3 is worth the money and saved hassle?
It could just be the camera or my mere 1 year experience jetting these 2 strokes but that plug looks a bit white to me. What altitude are you at? I'm running a 170 main and can take it anywhere from 4500 in town here to about 8000. I haven't tried taking it any higher but a quick adjustment of the screws seems to do get it right on point with no issue.
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