OK. high compression flat top piston. I have to think the head is smaller in size, or they gave you a pretty thin head gasket to get "high compression"
I would have to think there's some sort of debris inside the combustion chamber to close the spark plug gap, or the plug is reaching too far into the head/combustion chamber. (which may be the case since you removed the plug gasket).
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My Yerban assault vehicle: 2.2mm stroker crank, 62mm Nikasil cyl, Taida large vavle head, American made valve springs, ported intake manifold, TM 28mm carb, stock CDI, Bando coil, TK exhaust, stock CVT except for the 14g sliders, 13/40 internal gears, 16T drive, 31T axle sprocket, 22" rear tires, and ONE BIG POTATO CANNON mounted on top..........
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