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Shimano bar end shifter problem

Old 12-21-11, 02:14 PM
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Shutter
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Shimano bar end shifter problem

Hi, this is my first post...

One of my bikes has shimano bar end shifters (indexed) with a shimano tri-coloured rear derailer and 7-speed cassette... I can only get 6 clicks out of the bar end shifter.... From what I have read is there some sort of shim that makes the bar end shifter into a 6 speed? They were installed with new bar tape on the bike when I bought it do I don't want to take it all apart unless I know... I was able to adjust the derailer so that it hits the top or bottom 6 gears out of 7, but i want to hit all 7...

Thanks!
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Old 12-21-11, 02:29 PM
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Doesn't 6 clicks give you 7 positions?
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Old 12-21-11, 02:31 PM
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ask in mechanics or classics.
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Old 12-21-11, 03:07 PM
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6 clicks is 7 speed.

Most likely RD cable too loose, so you lose a click for tensioning. Would guess that you are getting either the upper or lower 6 by playing with limit screws, which is not their intended purpose. If you have cable adjusters, try taking up the slack.
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Old 12-21-11, 04:46 PM
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Originally Posted by RollCNY View Post
6 clicks is 7 speed.

Most likely RD cable too loose, so you lose a click for tensioning. Would guess that you are getting either the upper or lower 6 by playing with limit screws, which is not their intended purpose. If you have cable adjusters, try taking up the slack.
Agreed. Trying tightening tightening the slack on the barrel adjusters (e.g., screwing them OUT, CCW) or just go on youtube and watch a quick video on how to readjust your rear derailleur.
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Old 12-21-11, 09:46 PM
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Yea, I tried that... I think they are messed up internally because they aren't working correctly... I think I will start by replacing the rear derailer ... Now I need to find a matching shomano tro colour rear derailer...

I will bring it inside on the Bike stand this winter and give it another go with the adjusters...

I think that I only get five clicks actually ... I will have to experiment more and post some pics..
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Old 12-21-11, 10:06 PM
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There's not that much that can go wrong with barcons, though I admit I run mine in friction mode so I don't care if they click or not. I'd look at the limit screws again.
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Old 12-22-11, 02:35 AM
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Originally Posted by shelbyfv View Post
Doesn't 6 clicks give you 7 positions?
HAHA Indeed!
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Old 12-30-11, 12:12 AM
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Hi... ok, sooo, I finally got around to putting the bike back on the stand... the rear derailer is a Shimano 600 8 speed SIS Integrated Tri-colour... the Cassette is a Shimano HG 7 speed. The shifter is a Bar end shifter amd it clicks 6 times... yes... I can count =) that means 7 speeds... what I was wondering is whether Shimano even made a 7 speed bar end shifter, or is this a modified 8-speed one...... Not sure about how original the parts are as I bought it used as a backup road bike... The rear derailer is in kinda rough shape and the pulley bearings are making some noise...

One option I was thinking was to change the bar end shifter to be friction shift and then replacing the rear derailer... I have a brand new take-off Shimano Tiagra derailer sitting around so I'd like to use that one instead on friction mode...

How would I go about making the bar end shifter into a Friction shifter instead of indexed?

what does everybody think??










thanks!

Last edited by Shutter; 12-30-11 at 12:38 AM. Reason: added
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Old 12-30-11, 11:24 AM
  #10  
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Take a look at the other side of the shifter - there's a metal tab. Twist it and the shifter goes into friction mode.

Shimano did indeed make 7speed bar end shifters...they're rather rare and have quite the following. You don't need to change the rear derailleur if you go to friction, and additionally, I can tell just by looking at your pinch bolt that the cable is loose. Shimano systems require lots of cable tension. Make sure you're clicking all the way down to the starting position, loosen the pinch bolt, pull that cable hard and tighten the pinch bolt. Add more tension as needed via the barrel adjuster.
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Old 12-30-11, 11:37 AM
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If you unscrew the bar end shifter, there may be a round cam disc that allows you to switch to do different clicks simply by rotating it. Mine is 7,8,9 speed compatible. Try google search the manual by typing in your shifter model number.
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Old 12-30-11, 02:22 PM
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I just had this issue a few months ago! here is how we fixed it

https://techdocs.shimano.com/media/te...9830628723.pdf

Originally Posted by desertdork View Post
This is from my experience:

Once you incorrectly install and subsequently attempt to operate the improperly assembled barcon shifter, you've got to get back to point A. Shimano's directions for installation of new barcons even instruct the user to not operate or fiddle with the assembly prior to new installation. Unfortunately, those same instructions don't describe what exactly will happen if you do fiddle with them or the procedure to correct.

To restore the lever range and indexing action, you use the "lever boss cover" as a *key* to wind the lever back to its original position. Merely rotating the lever boss cover to its correct position won't necessarily correct the problem.

From recollection, here's how I have done this:
  • Remove or disconnect cable
  • Remove the lever and boss cover from shifter body
  • Install boss cover in correct orientation
  • Put lever in place on stud or "axle", but in the LOW position; that is, with the lever nearly parallel to the ground.
  • With either the screw in place or with your thumb & finger securely holding the lever against the boss cover, shift the lever to the HIGH position.
  • Repeat this action, if necessary, until the mechanism is restored to its original position. You'll know this when it won't rotate with gentle force.
  • Install the lever in the HIGH position and secure mounting screw. You should now be able to operate the barcon through the full range of indexing detents.
  • Re-install cable and adjust tension as necessary.
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Old 12-30-11, 03:28 PM
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There's a little square inside the index side, you have to give it half turn.
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Old 12-30-11, 07:00 PM
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Thanks for all the tips!!! I'm going to try and adjust the shifter to proper index shifting and see if I can get it going again...

Here's another question... I think that the bearings in the derailer are shot... if I replace that derailer with a 9-speed shimano tiagra one, will it work properly with the 7-speed index shifter?? do they work like that??

thanks!
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Old 12-30-11, 07:53 PM
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No and Yes.. Lol. Friction mode you will most likely get 8 or possibly the 9th speed to work. Indexing is different. They are specific unless the disc thing that the DRietz has mentioned. Than it should work fine.
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Old 12-30-11, 08:57 PM
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Originally Posted by DRietz View Post
Take a look at the other side of the shifter - there's a metal tab. Twist it and the shifter goes into friction mode.
Better illustration of what I'm talking about, via my badass Microsoft Paint skills:



Originally Posted by Shutter View Post
Thanks for all the tips!!! I'm going to try and adjust the shifter to proper index shifting and see if I can get it going again...

Here's another question... I think that the bearings in the derailer are shot... if I replace that derailer with a 9-speed shimano tiagra one, will it work properly with the 7-speed index shifter?? do they work like that??

thanks!
There are no bearings in the derailleur. There are bearings in the pulley wheels, which are actually just bushings and very easily serviced. You can also rebuild the main pivot spring. Either way, the 9speed derailleur will work with your 7speed shifters just fine. The derailleur doesn't really determine the speed, the shifter does. On a really broad level, some old derailleurs can't adequately reach across the entire cassette. Some also don't have the right shape to index properly. As long as you stay with Shimano derailleurs designed to index, you'll be fine.

Tension the cable.

Last edited by DRietz; 12-31-11 at 06:57 PM.
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Old 01-01-12, 11:15 AM
  #17  
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Thanks! I took the bar end shifter off and it seems kinda messed up... here's some pics of it...

the grey plastic ring is cracked... does that matter??

What model do I want if I need the 7-speed?? also, If I want to run friction mode can I use ANY Shimano / Dura Ace bar end shifter? even a new 10 speed on on friction mode with my 7-speed shimano 600 derailer??

thanks!

.

.


Last edited by Shutter; 01-01-12 at 11:20 AM. Reason: added
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Old 01-01-12, 11:31 AM
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You need the model you have to run 7speed. If it clicks 6 times, then it's 7speed.

You can use any speed of shifter on friction to shift any amount of gears. If you're looking to replace the ones you have, I'd take them.
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Old 01-01-12, 12:24 PM
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Hmmm, well where is the model number? Is that only determined by the number of clicks?

I think that the shifter may be screwed a bit due to the cracked plastic ring?? Does this matter?

Does anybody have some sort of an assembly diagram? I suspect that the shifter has been taken apart and reassembled incorrectly...
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