Garrick is correct on the chain situation. They stretch, need lube everytime you go out, alignment is also important. Put a straight edge from the back gear to the front gear outsides and align.
You found a small clutch spring! If that is the case you have a clutch problem. Take the clutch drum off and inspect. A new clutch assembly will cost you $325 if the pins are busted. Make sure you have a clutch support bracket installed. Do call Rick he is great, but wait till after he calls me. I am on his call list already. Spare parts are always nice to have. Don’t loose the washers (2).
good luck
rich