KMC Z7 chain for 8 speed cassete Can I use KMC Z7 chaing  (1/2 x 3/32) on 8 speed cassete Sunrace MFM-56?
When I changed the old chain with KMC Z7, the smallest sprocket and the largest are fine.
But in the between the shifting is not smooth and something feels not right (slipping/ skiping). NOTE: chain and cassete are both new.
Below are picture of KMC Z7 and Sunrace MFM-56.


P.S. There is also Z8 chain on KMC website. But it seems to me, that it absolutely the same size (1/2 x 3/32, pin=7.3mm).
UPDATE:
I tried a new KMC Z8 chain with width of 7.1mm.
But it didn't provide a significant improvement.
Maybe there is something wrong with a cassete ( a fake one?).
Z7 is one of if not the only 7-speed specific chains still made. It won't work right on 8-speed.