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[8352]

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[oldpotatoe]

Hi Paceline!

I have some old Shimano SL-BS50 bar-end 7-speed shifters, and they have the option to be set to SIS (Indexed) or FRIC (Friction) shifting. When I set it to either of these (see picture) and shift up and down the cassette a few times, it drifts back towards the middle of the shifter settings, somewhere between friction and indexed. This happens on either setting.

Does anyone know what might cause this and how I could fix this? It's making shifting really difficult!

Thanks

http://i.imgur.com/5tHvPYI.jpg?1

Big flat head, notched screw in center..tighten it.

[8352]

Big flat head, notched screw in center..tighten it.

It's tight alright

[Jgrooms]

It's probably upset that its been called a 'brifter'?




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[icepick_trotsky]

Have you disassembled and reassembled? Make sure the back plate is lined up correctly, etc.

[zennmotion]

The SIS detents in the rear shifters do wear out after a time, though I've always managed fine in friction mode. I'd check the cable and housing to eliminate the possibility of a misalignment or wear causing friction or the cable trying to pull back, especially if the screw is "tight alright", too tight causes issues too. I'd remove the lever, put a couple of drops of lube into the mechanism and re-attach, don't overtighten, then if it doesn't work check the cable and housing line for friction- sometimes the bar tape can pull the housing out of line at the end of the bar.

[AngryScientist]

lol at calling it a "brifter"

[Lewis Moon]

lol at calling it a "brifter"

BEifter?

[rccardr]

If I recall correctly, the SIS-to-friction change (or vice-versa) should only be done when the shift mechanism is in the first (smallest) cog. So try that.

[Blown Reek]

There are two types of cyclists. Those who use the term "brifter" and those who do not. And depending on the term you use, you offer a ton of insight as to the bicyclist you are.

[ColonelJLloyd]

http://i.imgur.com/5tHvPYI.jpg?1

You tape starting from the stem? Eww.

FWIW, as Dr. Radio Controlled Automobile alludes, this isn't intended as an "on the fly" switch. I'd disassemble the shifter (as Icepick says) to inspect and then set the desired setting before tightening the flat head compression screw.

[hokoman]

You tape starting from the stem? Eww.


You can tell he wraps from the bottom up, just look at the bartape overlap. :rolleyes:

[palincss]

There are two types of cyclists. Those who use the term "brifter" and those who do not. And depending on the term you use, you offer a ton of insight as to the bicyclist you are.

And of those who use it, there are those who use it correctly and those who do not.

[Blown Reek]

There is never a correct time to call a shifter a "brifter".

[MikeD]

Try with the D ring up (or is it down).