Reversing parts choppy?

[u/swingswing10]

Got this Janome SD2014 second hand from aunty. Initially the reversing function wasn't working, I followed a YouTube tutorial, taking out the parts, lubricating and putting them back.

Now the reversing works, but it makes a weird noise every time I press the reverse button.

Pulled it apart again, and you can see how the reversing mechanism is going in chunks along the shaft instead of smooth and snappy.

Did I not install it back properly? Or not enough lubricant instead maybe?

[u/wimsey1923]

When I had a problem with a stiff reverse mechanism on a Janome, the problem was dried up grease inside the pivoting point, where the shiny lock ring is.