>>et your diagnosis done first. What amount of chain stretch do you have?>>

Ditto !
Pull the cover and look. That will answer many of your questions..
Like , maybe the chain has been renewed [ you will know that looking b/c there will be a link clip]..and then you can measure chain stretch and test tensioner bleed.... along with ball adjuster size [ which should be 17mm].
You are asking tech questions before the fact. Not that we mind answering , but it sure makes more sense for you go pop the cover and see what's up.