2008 ec300 kickstart lever
 

Hi,
I recently removed the lever from the knuckle and now it doesn't stay tucked in - it looks like there's a missing spring/bearing I didn't notice when I took it off. Can anyone tell me how I can replace these please?

Either replace the whole thing with a Yzf250 one. You will have to do a search for the correct year. (Much stronger longer better design) or head up to you local bearing supply store. They often do loose springs and ball bearings. You will find something that will fit.

The local hardware store should have them too.

Having lost my YZ kicker (yeah I know) I missed it after having to put the old GG one back on. I found a Chinese yz one on Ebay or aliexpress. Except it was blue. Some oven cleaner gel removed that. Working well.