Pin in the output shaft (Z1-KZ900-KZ1000)

I answered a lot of questions for other members but now i have to ask here about this.
Do some readings in a Haynes manual for the 72 - 78 Zed models and found a pic with a mysterious pin
in the output shaft. Does anybody knows something about this pin and his function?
The Kawasaki service manuals shown nothing about this pin in the output shaft.

The mysterious pin



KZ900



KZ1000

Never seen that before. Must be another bike. Notorious for being inaccurate.
Steve

Thats how Kawasaki drives the chain lube oil pump on '73 Z1.

AHHH, thats the answer, never seen a chain pump assembly
Lesson learned, thank you Dr. Gamma

That's right. The pump is driven by the countershaft. Never had one. There was always a oil spot under Jim's bike but not mine or Larry's. Leaked like a Harley. :lol:
Steve