Fuel (spark plug wet?)
Compression (what's your compression with throttle open?)
Spark (do you have spark? What spark plug is installed and what is it gapped at?)
If you have all 3, then it must be a timing problem
I think the stock carb needs a larger needle/seat when using gravity fed. The guys on the other board can answer that better. If it's any question, just order a new set up. Prob around $20 shipped if that.
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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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