Missing clutch cover spring....? needed or not?

[jamesk]

So I've put near 2000 miles on this motor in the past. It has been sitting for about a year until this new bike build. I opened the clutch cover to grease and adjust the clutch as needed. And I noticed the spring under the clutch pad cover is missing. Now obvously, the spring is not completely necessary as I have apparently been running without it, but my question is what does the spring actually do? And what kind of damage can it cause not having one installed?

 

[crassius]

it keeps down rattling and helps to keep the lock screw in the slot of flower nut - I sometimes make one out of old piece of door spring laying around when it isn't there