Do you have a picture of what that looks like on the piston?View attachment 24782 I didn't remember my numbers right. Here's Rjames jug with the numbers. .45 out of this band.
I put a flame notch in the piston. The plugs get real close on these J.
Do you know how long it's been sitting?
I didn't touch the carb other than tune it and I dumped some bad stuff out of the tank