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it dies because it starves…
did you CLOSELY clean out the low speed circuit feeding the top.Recheck the side channel on the edge leading to the top half of the carb needle and drip chamber. IN the drip chamber you should see the needle point moving in and out as you screw and unscrew the needle. Check needle packing see video 11:17 13:50 & 14:50
inspect throttle plate it should be fairly closed at start to focus the crank case vacum on the 3 small drip holes in the top section of the carb.
if the plate does not close enough to much air will flow by the plate and the top lowspeed fuel supply won’ be sucked out.
make certain the atmospheric air supply is not blocked (small hole front of carb) see video at 7:45 and 10:00
try choking the from of the carb face while you start it
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