Good morning. Did you study these pictures pretty close? You adjusted the clutch rod that is adjusted with the round part next to the number 22 in the picture below right? I think I basically turned it until I had resistance on it with the engine off and the bike in gear. Then when I got the proper resistance on this part the bike would roll back and forth when I would use the clutch. If this is adjusted and the bike is still slipping then the clutch just isn't holding anymore.
Did the clutch go bad on you over time or did you get the bike with the clutch acting the way it is? Maybe someone didn't put it back together correctly?
I know that if this clutch rod adjuster isn't tight enough then when you kick the engine the kick starter will even feel like it's slipping. If it's not tight at all the kick starter won't even work. Just for reference I have the pictures of the inner workings of this mechanism here:
Honda Benly CA95 clutch connecting rod adjustment