Xin zui jia pai dang
Yamaha TT250. They has 'TD' on the side.
This is an XT250. If it is a US model, it would be a 1984 which had updated styling and drum brakes. Became the XT350 in 1985 with a disc front brake.They removed the air scoops on the tank, front fender and turn signals.
Yamaha RD500? In first picture (blurred, I'm sorry) I think we can read T2R or TZR; 2 and 3 pictures from rear views 1989 Yamaha TZR 125 or 250.