Hi Dave, I posted this Apollo video just so people can see better what i am describing in words here. I experienced the same issue as you at a very inopportune time where i could not fold down the stem. At first i was thinking what was i doing wrong? The pin was pulled the latch was down and the stem normally would just fold back without issues. The stem folding and its rigidity is also normally really one of the best features of the Phantom IMO.
What I wound up doing was removing the little screw and carefully with a flat blade screwdriver wiggling out the small square wedge that latches the stem to the stem seat. Then of course it folds (falls) down easily. Then I cleaned and lubricated everything and put it back together and tried to adjust that one little screw like they mention in the video. I have to say i have had to play with that screws position a few times now, as I believe it moves with vibration, and i never feel i quite get it right or it simply moves out of adjustment again. Then the latch feels either too tight or too loose. Sorry if my explanation is not the greatest here. It’s just my experience with it.
I have to be honest, I’ve become disappointed with the scooter and drive my Yume or Mantis as my choices before grabbing the Apollo for months now. When you have to remove and replace the display and the throttle 6 or 7 times, it gets frustrating. They just don’t have any issues other than a few simply fixed ones, like a loose cable or fasteners. I would like to love my Phantom too, because it does look good, the suspension is probably the best design, but so many little issues with it and surrounding the support you get from the manufacturer only seems to be good if you get frustrated with them and start pushing them to help.