Looking For A Street Legal 125cc Enduro Type Bike

One of my grandson's has a Honda 115cc twist'n'go. He now wants to sell it and get some kind of street legal enduro type bike with gears. This is an area I know nothing about but after having a quick look about I am struggling to find anything. I have successfully steered him away from buying anything chinese but that doesn't seem to leave much. Does anybody have a bike tucked away that they want to sell ? Or alternatively any ideas on where we might look ? I did have a look at the FB Mondial but again, I know nothing about this make.