RF900 Charging Failure Mystery

I did the work myself—
It didn’t get fixed—
And when people ask me about it…
There’s only one answer! “Keep pushing forward with more DIY!”
So, continuing from yesterday—
This kind of weird problem…
Honestly, I don’t really want to consult on it or dig into the cause.
It’s basically volunteer work??
I’m hoping for payment once you make it big! ★
According to K, who’s famous for ○○—
Here’s what happened:
Battery dies when riding
↓
Bought a used generator and swapped it in → didn’t fix it
↓
Returned it
↓
Bought a used one with voltage already tested → didn’t fix it
↓
Got them to buy a multimeter → voltage isn’t rising, but it’s holding steady
↓
When they came in on 7/20, it was a bit low but generating around 13.5V? Why?
By the way, there was an 80W headlight bulb in there, so I switched it back to 60/55W → maybe this fixes it?
But when they got home it was no good?
This morning again—? Do I have to look at it again?
It’s tedious, but I just have to verify each thing one by one.
Let me sum it up ★
• Voltage isn’t rising at all; it’s dropping.
• Looking from the top, the generator is spinning.
• The generator by itself isn’t generating power.
• Once in a while it generates about 3A?
So—
I measured the resistance on the regulators of both generators and tested the continuity of the circuits.
Nothing seemed particularly wrong…
The oil-cooled and generator shapes are different, so—
Staring intently at the inside…
Isn’t the center off? What is this??
 

 
This was sitting in some gooey rubber-like or grease-like stuff
 

 
That’s where it was hiding.
The cause of this symptom was—
The damper on the damper-equipped spline
deteriorated and was slightly slipping, so the generator was spinning, but ultimately it broke. ★
This time it just happened to show these symptoms. ★
There’s no answer, so thanks for your patience! ~