I am not the most experienced bike mechanic so I am not super user what I am looking for. What I can see is that when I put the chain back onto the teeth they chain is not straight.
But maybe that is not what you meant?
I also saw that the material that is on the lower wheel on the gear is wear down. It makes the chain jump. Can this be a part of the problem too?
Why can I not post any images here until I have 10 post? Thats stupid! But I have some photos!