Have you encounter any problems? (Striped, Stock bearing etc.)
And another, What is the cause when the yo-yo is Bent?
No problems besides pad replacement.
The cause of when an axle is bent, which i what I assumed you meant, is the yoyo will vibe or wobble.
i used to hot glue the insides of my speed beetle to make it heavier and improve spin time…and like samad said, the pads are a hassle…
as for your second question,
bent? or do you mean dinged, it depends if its beat up, it will cause major problems such as vibe, snags, and if its a metal yoyo you can get cut from metal burrs. If its only scratches here and there, there is no worry, performance wise…
~gorrilla_yo808 
loose axle