Also, you have to keep in mind that, people complain even when it is their own fault.
Hard to find neutral? Most of the time, it is because ...
The rider has never adjusted the shift pedal height.
Or, it is NOT set at the proper height.
Or, if aftermarket rearset is installed, some people set the shift arm at really stupid angle and complain about shift touch / feel, hard to find neutral, etc.
WRONG example
Right example (Shift arm - linkage rod 90°, linkage rod - arm on shift pedal 90°)
The rider is just too rough, has zero mechanical sympathy / understanding, just kicking the shift pedal and expect the transmission to find the neutral by itself.
Majority of these bike's owners have A LOT LESS experience, in both riding and wrenching on, than you do.
If you can keep 72 Four on the road and can ride that thing in today's traffic situation, I don't think you will have a problem.