If cam chain need to be replaced, why not replace the primary chains with tensioner at the same time? They must be stretched and rattle as a crazy rattle snake .
A must is at least to measure the slack of the primary chains from beneath, oil pan removed... New chains have 65 mm, service limit 70 mm if I remember correctly. My last OEM chains had 67.5 mm after appr 30.000 kms, 75% touring, I replaced them. All with around 80RWHP
Engine is pulled out of the frame, not that more to do it all opening the cases. Then use a HD cam chain without master link. The cases might leak a little oil... new and better sealer + oil seals. check of bearings etc etc.