Is this clutch basket a basket case

[gra0411]

I checked all round and there's nothing I could see or think of that would have caused that , I too thought the previous owner thought but then thought why would you and was stumped at that , although with the speed it rotates it would only take some item ( stumped as what ) to be wedged under bottom of basket for a short while to do it  but seems a but far fetched . Don't know if this is related but when the vibration started gear changes were so hard I had a bruised foot and most times it didn't select and took another go for it to select on up changes but then I changed the oil and that improved a lot , still tough but better , hang on though on bottom of inside casing under basket to right there is no paint just metal silver I thought it was how it is but now maybe something was there , I'm going now to see and post a pic
Thanks