Looks like Yamaha are continuing to produce two stroke Motocross bikes:
Lots of engine changes:
New cases house redesigned transmission gears, updated shifting mechanisms, and a high-inertia crankshaft assembly with an 8mm-longer connecting rod. There’s a new cylinder with relocated stud positions, increased port size and different shape, larger exhaust port, coupled with lower and wider transfer ports as well as a single rear transfer port. The head has improved combustion efficiency with an increase in volume and redesigned combustion chamber shape, while the new expansion chamber and 50mm (2.0-inch) shorter silencer provides a tone unlike any other YZ125. In short, almost nothing overlaps or interchanges with 2021 and prior machines engine-wise.