No, it's not a custom. It's production.
The Ace 125 is an upcoming production bike from Chinese manufacturer Skyteam.
It's passed US homologation and emissions tests and will soon be available for just $2500.
The Ace will also come in a 50cc variant.
Read more at the Skyteam website.
For the designer's eye, you're better off avoiding their website...and instead reading up at BikeEXIF.