I really don't understand how the 125cc Forza can weigh 162kg with ABS - the same as the Burgman 200! Both have 11L tanks.
The old Nouvo 135 weighs around 105kg, the PCX125 is 120kg, the PCX150 is 125kg, so it couldn't be the CVT.
Yamaha's upcoming SMAX with a 155cc 4 valve engine weighs 148kg, which is a bit of a porker, too. My CRF250M weighs a bit less than that.
Heck, a CBR250R with ABS weighs not much more at 167kg and the CBR150R is 24kg lighter!
What makes a 125cc scooter that heavy?