Shimano EP8 "clicking" sound after installing new chain

[Turtlehead]

2022 Orbea Rise H30
Replaced my chain this morning
As soon as I started riding/pedaling, I got this constant clicking sound.

At first I thought it was my derailleur and did a bunch of trailside troubleshooting there to no end. Makes the same sound even with the motor turned off and pedaling.

Any and all suggestions would be greatly appreciated.

Here's video of the sound:
<div style="padding:177.78% 0 0 0;position:relative;"><iframe src="" frameborder="0" allow="autoplay; fullscreen; picture-in-picture; clipboard-write; encrypted-media; web-share" referrerpolicy="strict-origin-when-cross-origin" style="position:absolute;top:0;left:0;width:100%;height:100%;" title="ep8"></iframe></div><script src="https://player.vimeo.com/api/player.js"></script>

 

[Astro66]

You've fed the chain through the derailleur incorrectly. Check it and do it again.

 

[Turtlehead]

You've fed the chain through the derailleur incorrectly. Check it and do it again.

Sadly - that was the first thing I checked, I've made that mistake several times in a rush, but it's not that :-(

 

[Astro66]

Chain guide above chainwheel. Any rubbing ?
Also B-Gap. Is it set correctly, or derailleur cage or cagewheels could rub.
Also. Did you put back the same number of chain links ?

 

[Turtlehead]

Chain guide above chainwheel. Any rubbing ?
Also B-Gap. Is it set correctly, or derailleur cage or cagewheels could rub.
Also. Did you put back the same number of chain links ?

I pulled the chain guide up to where it had no possibility of touching, didn't fix it

B-gap - I played with it trail side, but did not neccessarily set it correctly - will check this tomorrow

Number of chain links, I've always just held the new and old chain up in the air and removed anything beyond the older chain's length. Probably a half-link short on the new chain in the sense that the old chain's stretch put it between links. BUT - I started watching a video earlier that was discussing how to set the correct chain length, so might be worth trying to sort that out from scratch.

 

[Astro66]

Did you get the right chain ? Link thickness varies.

Also on this. Was the original chain and chainring correct ? Maybe you've fitted the right chain. But the original chain and chainring were wrong, so you now have a mismatching chainring.

Also on this. If you have skinny/fat teeth on chainring. Have you aligned skinny/ fat on the chain ?

 

[Ndanger]

Could I ask how many miles / km are on the drive train.

 

[Evelhornet]

Worn cassette or front chain ring not 'meshing' correctly with new chain?

 

[longpete]

Check if quicklink is properly closed and attached in the right direction.(arrow)

 

[RustyIron]

half-link short on the new chain in the sense that the old chain's stretch

That's a LOT of elongation. You might need to replace the cassette and the chainring.

 

[MeatBike]

Worn cassette or front chain ring not 'meshing' correctly with new chain?

That was my first thought when I watched the video.