What exactly would this do to a motor?

 

The centrifugal advance would not work lack of timing lack of power

 

Makes since. I pulled my distributer out of my motor to fix an oil leak and put a new cap and button on my distributer and when I took off the button I noticed that its missing a whole weight and spring.

 

So just to be clear this wouldn't have hurt my motor would it

 

No it won't hurt your motor (unless the weight or spring
fell down into the motor internals).
You just won't have any mechanical timing advance just the
vacuum advance.

The only down side would possibly be hesitation or lack of
performance to a small degree.

 

Continued operation with one weight missing would lead to destruction of the dist shaft and housing due to running the shaft out of balance.

 

Distributer is pulled out of the motor. I was just wanting to make sure I didn't hurt my motor while it was running before I found it.

 

Weight and spring advance curve kits are available aftermarket.

 

I'm just buying a new distributer since I need the kit and a new cap, button, and modular