Now i'm thinking that you just need to properly adjust your clutch cable, from the bottom end first, then tweak at the top. Only takes a minute to do with the correct tools (buy yourself a deep offset ring spanner)
Is the cable very old, maybe it's time for a new one?
And if you ever put the bike into gear on the centre stand the chain will always jump about due to wheel momentum trying to overtake the engine speed.
If you VERY GENTLY use the throttle the engine will then pull the chain and wheel and smooth things out.
https://www.ebay.co.uk/itm/281991913337?epid=1464643187&hash=item41a8071f79:g:I5gAAOSwOFFk2dn2&amdata=enc%3AAQAIAAAAwKamzpljFZdy%2FNd4QYZ%2BTqmzoSVyW8F20bY9NY5AVRdCFLRjvJjgSrxLZ7Lzl3fgimLMJ9QsRlXvbTov0yYaKNj9XrMvTddl0fYISWo7YiP%2F2qgWNEXqxTLbSuSvCMzjx0Wb%2B2krVUT4HATZrD5ep%2FuEIb%2FlktrNZ9deKSbOqEFHM8B5sERdELCbOJ4Hvj4wn7HFqBnbmzB1LnCjFMxZnBOTywQyR7d553CTei28Ffg6UmJZrkLRNpC1KfqHpb7JJg%3D%3D%7Ctkp%3ABlBMUPaJkqLCYg
Is the cable very old, maybe it's time for a new one?
And if you ever put the bike into gear on the centre stand the chain will always jump about due to wheel momentum trying to overtake the engine speed.
If you VERY GENTLY use the throttle the engine will then pull the chain and wheel and smooth things out.
https://www.ebay.co.uk/itm/281991913337?epid=1464643187&hash=item41a8071f79:g:I5gAAOSwOFFk2dn2&amdata=enc%3AAQAIAAAAwKamzpljFZdy%2FNd4QYZ%2BTqmzoSVyW8F20bY9NY5AVRdCFLRjvJjgSrxLZ7Lzl3fgimLMJ9QsRlXvbTov0yYaKNj9XrMvTddl0fYISWo7YiP%2F2qgWNEXqxTLbSuSvCMzjx0Wb%2B2krVUT4HATZrD5ep%2FuEIb%2FlktrNZ9deKSbOqEFHM8B5sERdELCbOJ4Hvj4wn7HFqBnbmzB1LnCjFMxZnBOTywQyR7d553CTei28Ffg6UmJZrkLRNpC1KfqHpb7JJg%3D%3D%7Ctkp%3ABlBMUPaJkqLCYg
More people are born because of alcohol than will ever die from it.