ericcc65

I was installing new cables on my Shimano Dura Ace 7900 system and I accidentally broke part of the "unit cover." In the pdf given at the link below it is part number 8 (Y-6SC98210). Supposedly it helps in removing the old cable to remove this cover first. It looked attached flimsily and with not much force I pulled it out, but that broke the plastic right where it attaches to the anchor bolt. I've called around but bike shops don't keep that sort of thing in stock. I can still put it there, I'm considering just taping it on with electrical tape, what do you think? Is that a bad idea? It seems the shifter should still work as it relies on having tension in the system apart from this cover.

https://bike.shimano.com/media/techdo...9830683887.pdf

Note that it's also mentioned in the installation instructions here:
https://bike.shimano.com/media/techdo...9830702962.pdf

FBinNY 

My first instinct is to put back what's left of it, and use electrical tape, or simply let the hood keep it home (if it will). I suspect it has no mechanical function except to maintain the external contour of the lever and support the hood.

If it bothers you, you can try emailing Shimano to buy a replacement.

ericcc65

Thanks for the response. I just put the cover back on (it sort of pops into place still) and attached it with electrical tape. I also put on another cassette and wheel and put in new cables, removed and cleaned the crankset, etc. It seems to be shifting okay, not as good as before but I hope I'll be able to dial it in some more.