Yamaha 250 FF
Customised Yamaha 250 scooter. Seen at Yamaha Riders Club Bangkok 2008. Peter F thought it was based on a Majesty, but I suspect that it's based on the more radical Yamaha Morphous, aka Maxim. Compare and contrast with the 2006 picture of a blue Morphous on this page. PNB

Updated Identification.
Well spotted Blez.