Chaincase reverse gear question

[yamaha06]

so I have my chaincase all ripped apart, and will be changing my upper gear as preventative maintenance. I was just curious if anyone else has little knicks / chunks out of there reverse gear? It's nothing major and I would assume normal since this gear shifts over to mate with the other gear when going into reverse. I also feel a couple sharp burrs on the top of the teeth so may just lightly file them. Just curious if anyone else has noticed this and if it's normal.

 

[kingtut]

Doesn't look too bad. My guess it would be normal since sometimes Yamaha's reverse doesn't lock in 100% of the time and it grinds.