I'm simulating screwing on the throttle to the carburetor by compressing the gold cylinder against the gray cap. As you can see, the spring compresses, and the throttle cable pops outward.

When I twist the moped's throttle, the throttle cable goes inwards. I believe this is the desired action for the cable.

There are two problems, however:

Nothing pushes the throttle cable back out when I release the moped's throttle.

The throttle needle does not move, but to my understanding it should go upward when I apply the throttle.

Please check out my Answers question if you can help me solve this problem! Thanks a lot!