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Yea I checked the jets .. clean as a whistle, i even tried drilling it out a little...still didn’t change a thing. It’s very odd... it never ran like this before storage ... cleaned it all up and set everything the same as it was. And now this... I can’t find any air leaks or pin holes in diaphragms, vacuum lines are still soft and pliable, valves are good compression is good.... I’m stumped

Hi guys first post here. I’m a decent mechanic and have worked on motorcycle for years, but can’t seem to figure out this simple scooter. I bought it for my wife years ago and it allways started hard. But once it was running ran great! Sadly we didn’t use it much and it was stashed in a backyard shed for probably the last 4 years, without being run. The shed was damp, and unfortunately the kill switch/starter button and blinker relay no longer work... I cleaned the carb very well and started it by crossing the starter solenoid .. and the scooter starts much easier than it used to oddly. But now if I twist past 1/2 to3/4 throttle it Boggs and stumbles like crazy, if I roll on easy it will rev much higher but if I roll on fast it stumbles almost right away..it used to carry me 50mph no problem not 30-35 is about max.. I thought maybe it was the carb running to lean or rich so I pulled the air filter off and it barley made a difference, so I tried covering up the filter a little and it again Made little difference. (Just trying to tell if it’s mix related or not) I’ve always been pretty good at playing with carbs and I feel like it’s not carb related anymore.... any ideas what would cause this ? This is a video link of the scooter revving on a stand.