Hi Alex,
Realistically your only hope at this point is to try to get the part
covered under warranty. I'm not sure what the component warranty
period is, but it's certainly at least a year. Shimano STI shifters
are not service friendly-- I've tried! i even bought an expensive
"castle" tool to aid in the partial disassembly (only to have the
fragile teeth break-- curses!) Even so, this only removes the lever/
shift assembly from the hinge/bar mount.
I've read about folks that claim to have fully disassembled STI
levers but I've read even more accounts of springs and other tiny
bits shooting all over the place and levers that just won't go back
together.
It's a sad state of affairs.
This is precisely why I switched to bar-end shifters (and knee-high
tube sox).
SRAM levers, on the other hand, are fully serviceable. (While I
would have loved to switch to these, integrated levers of any brand
seem to be fiendishly expensive and quite out of my financial reach.)
Good luck and get your bad self to a bike shop!
> Message: 1
> Date: Sun, 9 May 2010 12:10:27 -0700
> From:
> To: "obra"
> Subject: [OBRA Chat] broken right DA shifter help
> Message-ID: <2C56C4860B104F7F8663E5FF4F7BAE97@alexPC>
> Content-Type: text/plain; charset="iso-8859-1"
>
> OBRA-land,
> I need your help here. I went out for a ride yesterday and went to
> downshift and heard a 'snap' instead of the normal 'click-click' in
> my shifter. I looked down and the lever is stuck at about halfway
> between where it normally rests. From then on the bike won't
> downshift, only upshift (little/inner lever works, not the big one)
> and will make a slight clicking whenever it hits a normal shift
> point but won't engage.
>
> My question to you: did I break one of the engaging arms or
> something inside the shifter? Has anyone had this same experience
> before? If so, what did you do/how did you fix it?
>
> The shifter is a Shimano 7900 Dura Ace right shifter and will be a
> year old next week. It's never been crashed on or abused so I'm
> wondering if there was another cause of this or if it's a bad shifter.
>
> Any help/suggestions on this would be much appreciated. Thanks in
> advance,
> -alex wentz
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