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bar end shifter range

Old 04-02-09, 02:27 PM
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dwoeste
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bar end shifter range

Just bought a set of SL-BS77 9 speed shifters. They are supposed to be double/triple compatible, but I cannot get the front derailleur to get into the large chainring. The left shifter has about a 90 degree range. The derailleur is a 105 triple so that is not the issue. I have routed the cables all along the handlebars so that the housing is mostly under the handlebar tape. Would this cause the problem? Before I redo the cable routing I wanted to see if anyone else had any ideas.
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Old 04-02-09, 03:54 PM
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is the cable routed through the front derailleur cable clamp correctly?

if you push the shifter down all the way is the cable slack?

if you grab the cable with your hand and manually pull it does the derailleur go further up then the shifter can move it?
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Old 04-02-09, 06:22 PM
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How are the limit screws set on the derailer? If the derailer is set incorrectly, it will never be able to move that far no matter how much cable is pulled.
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Old 04-02-09, 07:10 PM
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It is certainly able to do what you want.

It is possible to disassemble the shifter and reassemble it with the circular ring (part 2 in this diagram) with the square hole in it in the wrong orientation and thus limit the shifters movement.

Correctly assembled it should be able to rotate about 150 degrees.

My barcons provide ample travel for triple chainrings. I've even seen one used on a tandem with four chainrings.
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Old 04-02-09, 07:36 PM
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Originally Posted by dwoeste View Post
The left shifter has about a 90 degree range.
Ahhh ... the old re-assemble the shifter on a different flat than dis-assembled from trick ....

Basically what happens is one generally plays with their shifter before getting ready to install. What we accidently do is disassemble the shifter from the square washer while it is in midrange and then reassemble the shifter with the lever in another position from what it was at disassembly usually the low cable slack position because thats where need it to thread the cable through.

Now you have a shifter lever at the low (cable slack) position with its "inards" already at mid-range.
So you start shifting only to find that the shifter (lever) stops mid-range (which is actually the "inards" hitting their stops at the high end).

To recover, shift the lever to low (cable slack) position. Take the shifter off the square washer and reassemble with the lever mi-range (one flat off from low). This places both the lever and the shifter "inards" at mid-range.

You should now have full shifter range.

Take a look at recent thread Barend shifter problems .
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Old 04-02-09, 10:50 PM
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Originally Posted by tippy View Post
Take a look at recent thread Barend shifter problems .
Dang there's a lot of problems with bar-ends recently. It's a good thing I bookmarked the Shimano exploded diagram:
http://techdocs.shimano.com/media/te...9830628723.pdf
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Old 04-03-09, 06:30 AM
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Originally Posted by Jeff Wills View Post
Dang there's a lot of problems with bar-ends recently. It's a good thing I bookmarked the Shimano exploded diagram:
http://techdocs.shimano.com/media/te...9830628723.pdf
It's not the barend shifters that are the problem. It's the failure of the "installers" to have the big picture that is the problem. It's not brain surgery but does require a minimal use of one.
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Old 04-06-09, 09:06 AM
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High limit was set all the way out.
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Old 04-06-09, 09:09 AM
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Had to do a lot of tweaking with the derailleur position, but I got it to work.
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Old 04-06-09, 09:14 AM
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One problem with bar ends is that you have to disassemble them to get to the clamp bolt inside the handlebar plug. If you don't pay attention to how they came apart, it's easy to reassemble the lever improperly.
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