Are pw50 wheels (rear) year specific????

[17853marktaylor09765]

Hi there, I have just purchased a 1982 pw50 in bits and am hoping to build it up for my son. The bike came with wheels but they dont fit the rear spline thats on the bike. I dont know if the wheels are oem or copies. Does anyone know if the wheels are year specific? Should all years wheels fit all bikes

[Gizmo]

Clone wheels run a different spline. I have that problem too