Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Dura Ace Brifter repair??

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

Dura Ace Brifter repair??

Old 07-18-09, 09:12 PM
  #1  
w98seeng
Senior Member
Thread Starter
 
w98seeng's Avatar
 
Join Date: May 2008
Location: Incognito
Posts: 392
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Dura Ace Brifter repair??

I can get a set of Dura Ace ST-7700C 2/9 brifters cheap. The problem is the guy says...

"Rear derailleur control shifts up the cogs with difficulty, and gets stuck on about the 3rd or 4th cog. You can shift it down the cassette, but you have to hold the main lever in place to get it to shift down. Front derailleur control appears to work just fine; however, it's missing the hood. Both brake levers work fine. Both caps, hoods, and levers themselves look quite good, and show no evidence whatsoever of crashing. Some corrosion present on both 'inner levers'. Bands that attach levers to bar are missing. Single flight deck button on inside of right hood"

Are theses problems fixable at a reasonable cost? Are the "Bands that attach levers to bar" replaceable? I can probably get them for around $75.

Thanks,
Ian
w98seeng is offline  
Old 07-18-09, 09:23 PM
  #2  
mzeffex 
Senior Member
 
mzeffex's Avatar
 
Join Date: Mar 2009
Location: Colorado
Posts: 9,431

Bikes: Something Canadian, something Italian, something American, and something German

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 13 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Brifters that don't work are not a good idea to buy. You might be able to unstick them, but you would have to buy them and play around with them to find out. At my shop, we have a couple RSX, one 105, and one ultegra shifter that are gummed up inside and after playing around with them for an hour, using a bunch of methods of undoing this, no luck. Unless those are dirt cheap, IE, you don't care if it ends up wasted, then I wouldn't do it.
mzeffex is offline  
Old 07-18-09, 09:25 PM
  #3  
z415
Senior Member
 
z415's Avatar
 
Join Date: Apr 2006
Location: Gainesville/Tampa, FL
Posts: 2,343

Bikes: Trek 1000, two mtbs and working on a fixie for commuting.

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Flight Deck button: useless unless you plan on using the Flight Deck cyclometer system.

Bands are replaceable: here. You might need to know your exact product code.

Hoods: replaceable - you can get colors as well. Might be able to find it at the site above.

Shifting: eh, depends - Shimano shifters are tricky and generally considered not serviceable.

I personally would not got it without treating it as a sale for only the front/left shifter.
z415 is offline  
Old 07-19-09, 07:58 AM
  #4  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,342

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1089 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Run, do not walk, away from this deal. These things have way too many problems and Shimano brifters are not really servicable. Solvent washing followed by copious lubrication can sometimes get them working again but it's iffy and temporary.
HillRider is offline  
Old 07-19-09, 11:55 AM
  #5  
w98seeng
Senior Member
Thread Starter
 
w98seeng's Avatar
 
Join Date: May 2008
Location: Incognito
Posts: 392
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
OK, not serviceable, forget it then. Thank you for the help.
w98seeng is offline  
Old 07-20-09, 03:05 PM
  #6  
Thasiet
Acetone Man
 
Join Date: Oct 2004
Location: PDX
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Semi-serviceable:

http://www.norvil.net/pedal/service/...osti/index.php
Thasiet is offline  
Old 07-20-09, 05:43 PM
  #7  
tellyho
Your mom
 
Join Date: Aug 2006
Posts: 2,543
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I know some guys claim they can repair brifters; I've never heard from anyone who's had it done.

People have reclaimed dead brifters with the WD40 flush and Triflow lube. I wouldn't buy a pair for this purpose unless they were $10.
tellyho is offline  
Old 07-20-09, 09:01 PM
  #8  
Thasiet
Acetone Man
 
Join Date: Oct 2004
Location: PDX
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I've personally rebuilt 8 pairs of broken STI levers to like new functioning condition and sold seven of them on eBay. 8 speed only, RSX-600 groupsets, whose internals are all basically identical. 8 and 9 speed Dura Ace have very similar internals to each other and are also apparently rebuildable. Other 9 speeds, 10 speeds, and sora shifters are likely not rebuildable profitably.

I take the shifters apart completely and rebuild them with a fresh coat of grease. Flushing with WD-40 and triflow may temporarily rehabilitate an uncooperative pair of shifters, but it is also a guaranteed pathway to premature wear. STI mechanisms were designed for grease.
Thasiet is offline  
Old 07-21-09, 02:55 AM
  #9  
zacster
Senior Member
 
Join Date: Jul 2004
Location: Brooklyn NY
Posts: 5,972
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Buy Campy. They are serviceable.
zacster is offline  
Old 07-21-09, 05:51 AM
  #10  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,342

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1089 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Thasiet View Post
I take the shifters apart completely and rebuild them with a fresh coat of grease. Flushing with WD-40 and triflow may temporarily rehabilitate an uncooperative pair of shifters, but it is also a guaranteed pathway to premature wear. STI mechanisms were designed for grease.
I believe a more accurate description of what you do is to disassemble, clean and relube the brifters. You don't actually rebuild them as replacement parts aren't commercially available and if you find a broken part, the brifter is history unless you can canibalize it from another brifter.

Campy brifters are truly rebuildable as repair and replacement parts and instructions are available, if expensive.
HillRider is offline  
Old 07-21-09, 08:19 AM
  #11  
Thasiet
Acetone Man
 
Join Date: Oct 2004
Location: PDX
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by HillRider View Post
if you find a broken part, the brifter is history unless you can canibalize it from another brifter.
Ooooh but that's exactly what I do! Your incredulity is so thick, I think should spread it on my morning toast.
Thasiet is offline  
Old 07-21-09, 11:09 AM
  #12  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,342

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1089 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Thasiet View Post
Ooooh but that's exactly what I do! Your incredulity is so thick, I think should spread it on my morning toast.
Of course it's what you do, there is no other way. Why incredulous? I said Shimano repair parts aren't commercially available and that was correct. Enjoy breakfast.
HillRider is offline  
Old 07-21-09, 11:34 AM
  #13  
masiman
Senior Member
 
Join Date: Oct 2005
Posts: 1,735
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by HillRider View Post
Of course it's what you do, there is no other way. Why incredulous? I said Shimano repair parts aren't commercially available and that was correct. Enjoy breakfast.
I agree with HillRider. Rebuild implies replacing parts, and I don't believe you are replacing any parts in the brifters. Don't take offense if your understanding of nomenclature is lacking .
masiman is offline  
Old 05-05-15, 01:35 PM
  #14  
pgoat
BatŁwŁ Griekgriek
 
pgoat's Avatar
 
Join Date: May 2005
Location: NYC - for the moment...
Posts: 2,908

Bikes: 1985 Trek 500, 1986 Trek 500 Tri Series, 2005 Cannondale R1000

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Sorry to revive an ancient thread - New Question:

I have a right 7700 brifter which suddenly stopped upshifting (it would shift to larger cogs just fine, but to get back outward to smaller cogs, I needed to do a convoluted multi-finger shift, holding the big lever outward with the back of my middle finger while pushing in quite hard on the small lever).

I replaced the brifter on the bike; the new one is working fine, so the issue is obviously my old brifter, not cables, the RD, etc.


I tried spraying WD40 in several times while the old one was still on the bike, and took it to my LBS, where they also shot it full of solvent and lube - no luck.

I was going to toss it but figured I'd try one last time; I currently have it sitting in a container of degreaser...after two-three days, no change.

I was going to try disassembling, since it is probably toast....but then I did have one final thought - assuming I forget using it as a shifter, any reason why I couldn't use this as a simple rear brake lever, for an old beater bike?
__________________
Originally Posted by jsharr View Post
People whose sig line does not include a jsharr quote annoy me.
pgoat is offline  
Old 05-05-15, 03:37 PM
  #15  
bikeman715
Senior Member
 
bikeman715's Avatar
 
Join Date: Mar 2008
Location: Salinas , Ca.
Posts: 2,657

Bikes: Bike Nashbar AL-1 ,Raligh M50 , Schwinn Traveler , and others

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 84 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
any reason why I couldn't use this as a simple rear brake lever, for an old beater bike? If you want to use it just for brakes I see why not . Shifting and braking are two different things one does not affect the other .
bikeman715 is offline  
Old 05-05-15, 04:55 PM
  #16  
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 31,342

Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1089 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
As a plain brake lever it is certainly suitable. Having a brake lever that can move sideways as well as fore-and-aft will be a bit unusual but it will definitely work.
HillRider is offline  
Old 05-06-15, 08:13 AM
  #17  
pgoat
BatŁwŁ Griekgriek
 
pgoat's Avatar
 
Join Date: May 2005
Location: NYC - for the moment...
Posts: 2,908

Bikes: 1985 Trek 500, 1986 Trek 500 Tri Series, 2005 Cannondale R1000

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by HillRider View Post
Having a brake lever that can move sideways as well as fore-and-aft will be a bit unusual
Hmm, true, I didn't consider that. But I'm used to it from using brifters, so it should be okay.

This would be going on an old steel bike with DT shifters, for short commuting rides, so not a huge deal in any case. Just as long as it stops the bike.
__________________
Originally Posted by jsharr View Post
People whose sig line does not include a jsharr quote annoy me.
pgoat is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.