bikerjp

I'm curious if anyone has noticed or knows how to fix a buzz in DA9000 shifters. I admit I'm not 100% sure that is the location, but I've tried to isolate it and it seems to stop if holding the shifters. I notice it when riding on patches of chip seal. It seems to be a mix of speed and surface that generates just the right frequency vibrations. It never happens long enough to really isolate it, but this is my best guess. Anyone noticed anything similar and/or have a solution? It's kind of annoying.

On a related note, how can I identify if I have 9000 or the supposedly fixed 9001 shifters?

Thanks.

fstshrk

Not directly related to DA9000 (since I can't afford them), but on my carbon bike, the buzz happens if the shift cables are vibrating against the headtube where they enter on rough/chip seal pavement. The solution was to cut the cables shorter there so there was not as much slack.

bikerjp

Thanks for the suggestion. I did try to see if the cables were the cause and that doesn't seem to be the case. My cables actually don't rest on the HT. I did have this issue on my Synapse but it was not a buzz but more a clicking or tapping. This sound is really more like a buzz.

hueyhoolihan

IME, the potential sources of bike buzzes are more numerous than you can shake a stick at.

bikerjp

Very helpful.

Assuming I have correctly identified the issue, any thoughts on why it might buzz and how to correct it?

Psimet2001 

Traditional buzz from Shimano shifters is a legacy issue. Usually caused by the shift levers vibrating against each other (if you have the mechanical group) or in the interface between the lever and the roof of the hood housing. You can recreate it by bouncing the front end of the bike as though checking for a loose headset.

It's a disgusting sound.

Campag4life

Sorry but I dismiss the legacy issue when it comes to DA 9000 and Ultegra 6800. Both were clean sheet redesigns and road vibration has to be part of Shimano's DFMEA/DVP&R...has to be.

I recently installed DA 9001 shifters on my favorite road bike and then removed the groupset and went back to Campy.
I had no issue with any vibration sound. If it did rattle I would have noticed and I am a fussy guy. I am quite sure your issue is set up OP.
Aside what I consider to be poor ergonomics, build quality and shift performance etc was excellent.
I did ride the bike over some rough road but chip seal is going to bring out the worse in any vibration signature. Double check your cable routing...hold all the cables as you ride over the rough road. Also make sure your cable tension is proper.

As to the difference between DA 9001 and DA 9000...its subtle. DA 9001 has a slightly different lever shape up at the top. The top mech is more sealed for improved aesthetics and less opportunity for contamination, Shimano revised the wrist pin position...missed the mark on DA 9000 which is quite a glaring design error in this day of CAD. Easiest way to know is...the shift cable cover...the little cover that you pop off when you roll the hood rubber back to install the inner cable...the shape of the 9001 cable cover is the same as 6800 which was released after DA 9000 and apparently Shimano determined they could commonize or the 6800 cable cover was a better design. There has been speculation that DA 90001 shifters have eliminated cable fraying associated with 9000 but this hasn't been confirmed and Shimano denies the issue entirely...but I wouldn't believe their company line any farther than I could throw it.
HTH

Following link should help:
DA 9000 cables - Weight Weenies