Last time I used a split link chain was on a CB200 Honda in 1975.
I would never use them on any bike over 250cc
Was sent this picture last week for advice on what to do
This is the result of a badly riveted rivet link and this fellow was lucky he saw it before it broke.
Looked like the head of the rivet was cracked when fitted by a heavy handed fitter.
His last chain broke when he was doing over 90 because it was over tightened by the mechanic he uses
he was extremely lucky as he only put a crack on the sprocket cover and broke part of the hugger. The chain ran through with no other damage.
I advised him to change the chain and sprockets if he could afford it since they had over 16000 miles up and change his mechanic
He has taken my advice