Funny that those are available many places for less than $3. Took my 8 speed lever apart far enough to see that the corresponding ring is fine. The mating bits appear to be pressed together with the lever itself in the assembly. My curiousity did not extend to prying this apart. No loose bits of plastic or metal dropped out. Everything was clean & not gunked up. I just reassembled as-is & everything functions properly (not always a given when I start playing around). I'll take it out tomorrow to see how the indexing does under load.
dougP On Thursday, October 13, 2016 at 5:54:44 AM UTC-7, Tim Gavin wrote: > > That plastic ring says it's for BS78 shifters, which are 10 speed indexed > (no friction option). FYI > > Tim > > On Wed, Oct 12, 2016 at 10:09 PM, dougP <doug...@gmail.com <javascript:>> > wrote: > >> This may be it: >> >> https://www.modernbike.com/shimano-sl-bs78-rear-shift-lever-boss-cover >> >> But this doesn't say how many speeds. It does say what levers it fits. >> When Shimano first brought out SIS, those little tabs inside these washers >> used to break off. Bike shops had bags of them & just handed out >> replacements. I haven't taken mine apart to see what's failed. It could >> be some of the tabs are worn to the point of not accurately indexing. Now >> I've got a project for tomorrow. >> >> dougP >> >> On Wednesday, October 12, 2016 at 8:03:10 PM UTC-7, Hugh Smitham wrote: >>> >>> Doug, >>> >>> I think that part rotates 90 degrees and changes the pull ratio. The >>> part I think that's broken is the plastic ratcheted pieces. When I get home >>> I'll pull it apart and investigate. >>> >>> On Oct 12, 2016 7:56 PM, "dougP" <doug...@gmail.com> wrote: >>> >>> Now you've got my curiousity. I'm thinking the wear part is the silver >>> plastic goodie that Bill mentions having to be in correct alignment. It's >>> a loose part so it is replaceable. Whether they're readily available is >>> another question. On my 8 speed, I just switched to friction a couple of >>> years ago but admit having index would be nice. >>> >>> dougP >>> >>> >>> On Wednesday, October 12, 2016 at 5:27:48 PM UTC-7, Hugh Smitham wrote: >>> >>>> And to my understanding not replaceable. >>>> >>>> On Oct 12, 2016 5:27 PM, "Hugh Smitham" <hughs...@gmail.com> wrote: >>>> >>>>> I wouldn't even know where to start looking for that? Nor what that >>>>> is. I think the issue is the small internal ratchets. >>>>> >>>>> On Oct 12, 2016 5:17 PM, "dougP" <doug...@gmail.com> wrote: >>>>> >>>>>> Is it possible to buy just the indexing washer? >>>>>> >>>>>> dougP >>>>>> >>>>>> On Wednesday, October 12, 2016 at 10:43:05 AM UTC-7, Hugh Smitham >>>>>> wrote: >>>>>>> >>>>>>> Very often people rotate the shifter base by 90 degrees by mistake >>>>>>> because the shifter has been on and off its based several times in its >>>>>>> life >>>>>>> and people just lose track. >>>>>>> >>>>>>> I tried that Bill. >>>>>>> >>>>>>> Sounds like the shifter is shot. >>>>>>> >>>>>>> ~Hugh >>>>>>> >>>>>>> “Life is like riding a bicycle. To keep your balance, you must keep >>>>>>> moving.” ― Albert Einstein >>>>>>> >>>>>>> http://velocipeedemusings.com/ >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wed, Oct 12, 2016 at 10:40 AM, Bill Lindsay <tape...@gmail.com> >>>>>>> wrote: >>>>>>> >>>>>>>> The internals of a shimano indexed barcon shifter are not >>>>>>>> repairable. >>>>>>>> >>>>>>>> 1. What model exactly is your shifter? >>>>>>>> 2. exactly which index positions are missed? >>>>>>>> >>>>>>>> The answers to 1 and 2 might imply a setup mistake. Very often >>>>>>>> people rotate the shifter base by 90 degrees by mistake because the >>>>>>>> shifter >>>>>>>> has been on and off its based several times in its life and people >>>>>>>> just >>>>>>>> lose track. The base piece fits onto a square protuberance on the >>>>>>>> shift >>>>>>>> pod. The shifter itself has a round recess with a single rectangular >>>>>>>> keyway. The corresponding round feature and keyway on the shifter >>>>>>>> base >>>>>>>> must be oriented correctly. The correct orientation has the keyway >>>>>>>> pointing DOWN towards the ground, tilted slightly towards the REAR of >>>>>>>> the >>>>>>>> bicycle. >>>>>>>> >>>>>>>> If you are missing random middle shifts, and are not missing one >>>>>>>> end or the other, then this setup error is not your problem and your >>>>>>>> shifter is just shot. >>>>>>>> >>>>>>>> Bill Lindsay >>>>>>>> El Cerrito, CA >>>>>>>> >>>>>>>> >>>>>>>> On Wednesday, October 12, 2016 at 10:30:49 AM UTC-7, Hugh Smitham >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> I have a right dura ace bar con shifter that misses some of the >>>>>>>>> index positions. It works fine in friction but I like my index. Does >>>>>>>>> anyone >>>>>>>>> know whether the internals are repairable? >>>>>>>>> >>>>>>>>> ~Hugh >>>>>>>>> >>>>>>>> -- >>>>>>>> You received this message because you are subscribed to a topic in >>>>>>>> the Google Groups "RBW Owners Bunch" group. >>>>>>>> To unsubscribe from this topic, visit >>>>>>>> https://groups.google.com/d/topic/rbw-owners-bunch/Wz8uc5aFq0s/unsubscribe >>>>>>>> . >>>>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>>>> rbw-owners-bun...@googlegroups.com. >>>>>>>> To post to this group, send email to rbw-owne...@googlegroups.com. >>>>>>>> Visit this group at >>>>>>>> https://groups.google.com/group/rbw-owners-bunch. >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>> You received this message because you are subscribed to a topic in >>>>>> the Google Groups "RBW Owners Bunch" group. >>>>>> To unsubscribe from this topic, visit >>>>>> https://groups.google.com/d/topic/rbw-owners-bunch/Wz8uc5aFq0s/unsubscribe >>>>>> . >>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>> rbw-owners-bun...@googlegroups.com. >>>>>> To post to this group, send email to rbw-owne...@googlegroups.com. >>>>>> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "RBW Owners Bunch" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/rbw-owners-bunch/Wz8uc5aFq0s/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> rbw-owners-bun...@googlegroups.com. >>> To post to this group, send email to rbw-owne...@googlegroups.com. >>> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >>> For more options, visit https://groups.google.com/d/optout. >>> >>> >>> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to rbw-owners-bun...@googlegroups.com <javascript:>. >> To post to this group, send email to rbw-owne...@googlegroups.com >> <javascript:>. >> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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