Joined: Jul 2015
Posts: 7,364
Likes: 3,217
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
i've installed dozens of KMC Z72's and Z51 chains... other than one certain rider that has BROKEN a Z72, i've had no issues at all with them... and at least two of those installs were onto uniglide cassettes.
you have some other issue causing the noise. Severely worn teeth will cause excess noise.
that "certain rider" also broke an X9.93 recently, too.... he's a BEAST.