Is that a carbon bicycle?
If so, it makes it having a motorino less likely.
The motor must be located by a bolt through the seat tube, otherwise the motor would spin in the tube rather than use its power to turn the bottom bracket.
The locating bolt/rivet is also another way to tell if the the bike has a motor.
It's possible to disguise the bolt/rivet head by paint or by putting it under a decal, but someone running their fingertips around the tube would feel it.