My scooter, owner's manual and cyclepedia wiring diagram all agree with this :
red wire - in the yellow plastic fuse case is a 15A fuse
black wire - in the clear fuse case is a 10A fuse
Do not use more than a 10A fuse on the black wire.
Something is shorting to keep tripping the fuse.
This is the first report of this issue with these LIKE's - so, I have little more than guesses to offer.
I'd start by cleaning the two battery terminals and cable ends. Then clean and tighten the (-) battery to frame ground point. (visible under panel right side engine area, small gold hex-head screw securing black (-) battery cable to frame)
Consider using a little shot of electrical contact cleaner in the kill switch and start button - then work them a few times(with the key OFF)?
Again, recommend you spend a little of what you saved in this purchase to obtain a
www.cyclepedia.com manual & then ask their techs. The manual will be useful for the years of your ownership.
Stig