It sounds like a choke issue to me. It could be the following:
Faulty choke circuit on the carb.
Corrosion jamming up the choke plunger.
I'm assuming this scooter has a carb.
I sold a Hyosung 2-stroke to a co-worker and he shorted me $50 so I offered to void the 90 day warranty instead of him paying me the other $50, and he agreed. He would kick start this scooter like 75 times before it would start! We called it the the "Kick-A-Palooza" and would watch him kick start it from our warm cars after work. One day someone told him to hold the throttle wide open while kick starting it and it fired right up. So try to hold the throttle wide open when starting your scooter. If it starts it's a problem in the choke circuit.
I had a Yamaha Zuma 125 and it wouldn't start when it dropped below 40ish degrees. Being a EFI system I just traded it for something different. Turns out the wire loom under the floorboard wasn't "loomed" and the bare wires ran over a sharp weld, grounding out the wires that activated the enricher circuit for cold weather. I no longer buy Yamaha products.
Finally, are the valves adjusted? Tight valves can cause hard starts.
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