When you did the compression test, was the throttle held wide open? (needs to be) Is the battery fully charged?
If the test still comes up low, check the valve adjustment. Go on youtube and look up GY6 valve adjustment. Just need a few tools to do it.
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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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