Wahoo Kicker rough shifting

[Roypw]

Wahoo Kicker. Shifting to smaller cogs mainly in the middle gear range is very rough. Lots of slack causes the pedal to slam as it takes up the slack. I have adjusted many derailleurs on my bikes, family and friends with success. I have adjusted this one over and over. Set stops, adjusted B screw, cable is free and smooth. Before I took the wheels off the bike it shifted smooth riding outside, also with Shimano Ultegra 11-32 cassette. I have changed the chain, KMC top line chains. I did replace the 11-28 Sun 11-28 cassette that came on the Kicker with my spare Shimano Ultegra 11- 32 right after I got the Kicker. Only rode the Sun cassette briefly but as I recall it didn’t shift very smooth either.
I raised a support ticket with Wahoo, no help. Talked with bike shop where I bought the Kicker, again no help.
Anybody with similar problems? Any suggestions or help would be appreciated.

 

[CXRAndy]

Post a video showing the problem.


If the cassette was correctly fitted and correct spacers for your frame, then its down to the bike setup

 

[Roypw]

Post a video showing the problem.


If the cassette was correctly fitted and correct spacers for your frame, then its down to the bike setup

I have checked with Wahoo support on the spacers, all ok. 130mm Shim is correct. I look at it this way, it shifted smooth with the wheel on riding outdoors. All components the same except the Kicker and it shifts rough.
I took the cassette off last night and checked that it it mounted correctly. It was a little loose so I took a couple extra clicks on the ring to be sure it is secure.
The cassette is the same Ultegra 11-32 but it us a brand new spare . I may take the one off the wheel and put it on the Kicker but I really don’t suspect there is something wrong with that spare cassette. Got me puzzled