Wow just now saw that Stig had a sticky dealing with this very thing. I havent read it will see if
he handled it like I did or if he had a better trick . lol Just saw it after I posted this .
Issue was exactly what the video showed.
If its this common you would think Kymco would of done a recall esp since your scooter dies in the middle of driving.
Will warn about taking off the filter/pump , it has a really grippy seal , I had to slowly edge a flat
head screwdriver all the way around. The screwdriver wont hit the seal , its located lower then the edge.
Then putting this thing back was a huge pain. Maybe the seals swell due to being near gas but huge pain.
Its not your standard black seal its a flesh colored seal. I had to slowly pound my way around using a rubber mallet and piece of 2x4. Finally got one side down , no way could I use equal pressure and get it back on that way . So on the one down side I put in 2 of the bolts and gently tightened as much as I could without stripping threads or getting it cockeyed. Then more pounding , then I took the longer bolts that held the bucket in and used those to gently press down the other side of the pump .
Then a back and forth with bolts then remove seat bolts when you can get closer to the bolt hole with the shorter pump bolts then lots of crisscross tightening.
Then I did a valve adjustment and spark plug change and it fired right up.