[Closed] Non standard jockey wheels - impeding shifting?

Swap them for standard Shimano jockey wheels and see what happens? I've had shifting issues that only went with a change of jockey wheels in the past, so I wouldn't rule it out, maybe clean up the mech thoroughly and lube the pivots as well / first?

The Mech is clean as a whistle, clean and lube after each ride

Sounds like the mech hanger is bent

My guess would be the old jockey wheels allowed for more misalignment.  my bet would be mech hanger bent and the old jockey wheels wobbled about or where so worn that they held the chain less firmly thus the misalignment did not matter

I have had this - replaced some horrendously worn jockey wheels and found it much harder to get precise shifting afterwards

You said the outer/inner is new, but how's the routing? Any kinks or pinches?

Assuming everything is straight and true and if the jockeys turn out not to be an issue, could a bit of snagging/friction in the cable be causing issue in shifts down the block?

Oh and just double check if the chain is directional, and if so on the right way?

Edit:

My guess would be the old jockey wheels allowed for more misalignment. my bet would be mech hanger bent and the old jockey wheels wobbled about or where so worn that they held the chain less firmly thus the misalignment did not matter

But also ^^this^^ shimano's "floating top jockey" is an old idea that made their shifting better (IMO) for years. Essentially it makes the derailleur more tolerant of minor missalignments.

If you’ve changed the cable have you routed it around the clamp on the mech the correct way?

I made the mistake of routing the cable the wrong way and it caused the shifting issues you describe.

Slow shifting can be a symptom of b-tension needing adjustment.

Is the rear mech cage bent? Does the cage have a decent spring action?

somethings bent or cable tension.

So cable is a single run and currently not clamped in the guides
Mech hanger is perfect no issues
Cables tension is just so that it moves up the block

Mech hanger is perfect no issues

Checked with the proper tool?

And chain is not directional, SRAM 1130 and cable clamped correctly

@tjagain it's my job dude, of course with the proper tool

Then something other the mech hanger is bent. If it's going up perfectly and not coming down again, It's either not aligned (bent) or there's too much tension. You set up the H & L stops OK?

Did you unsquash the ends of the cable outer after cutting? Could be cable friction holding the mech springs back.

Also is the cable clamped in the correct place?

Are the springs in the mech parallelogram nice and firm, or a bit slack?

If it goes up the block to the bigger sprockets but doesn’t come back down to the smaller ones it points either to springs not doing their job or cable holding things back.

bikerevivesheffield

Considering you are often asking for help on here its not a daft question to ask.  If you ask for help then you will get basic questions asked of you.  Got to eliminate the possibilities.  Its a process of elimination

Next most likely is as big black shed suggests.  What you describe does not sound like jockey wheels to me.  If its not the mech hanger  then cables sticking seems next most likely.  Its normal to have to open up the ends of the cables outers after cutting them.  I do this routinely with a bradawl

Is the cable going slack when you try to make one shift down?

The answer was "yes" to done extent, knackered bearing causing lateral movement, all good again 👍

Good you found the answer.  sometimes these things are utter beggers to find

The answer was “yes” to done extent, knackered bearing causing lateral movement, all good again 👍

Wheel bearing?

Jockey wheel bearing

I down-graded my jockeywheels to non-bearing Shimanos. The Tacx jockeys were great until a little bit of wet mud rendered them solid.