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  1. #1
    No, your OTHER left!! bikenut2011's Avatar
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    RD woes... need some wisdom

    The Suntour Cyclone friction RD on my 86 schwinn keeps wanting to jump in to a higher gear while riding, mainly when i'm straining to get up a hill.

    I have adjusted and adjusted and basically tried everything i know to do.

    The bike has a new shimano 13-28 FW, new shimano 6-7-8 chain, new stainless cable and a new piece of cable housing from the rear frame to the RD... it almost seems like its too slick and not enough friction the way it slips.

    PLEASE HELP!!

    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
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  2. #2
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    Slipping often occurs at the shift lever. What's that setup like on your bike?

    Neal

  3. #3
    Senior Member miamijim's Avatar
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    Quote Originally Posted by nlerner View Post
    Slipping often occurs at the shift lever. What's that setup like on your bike?

    Neal
    +1. Surprisingly you'll need thoroughly clean all of the shifter internals and then lubricate everything. Sometimes on rare occasions a flexy frame can cause ghost shifting into a higher gear.
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

  4. #4
    No, your OTHER left!! bikenut2011's Avatar
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    OK, will try!!

    thanks guys

    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  5. #5
    No, your OTHER left!! bikenut2011's Avatar
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    Oh, I just forgot in my original post, the bike originally had a suntour 6 spd fw, and the shimano is 7 spd... would that contribute at all?

    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  6. #6
    Senior Member Chombi's Avatar
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    You should really run a narrow chain with your 7 speed block. The regular width chain, if that's what you have on the bike, might be more prone to ghost shifting (because of the narrower sapcing of the rear cogs) if you get some rear frame flex while climbing. Try somethinhg like a narrower SRAM modern chain to see if the ghost shifting dissapears.

    Chombi

  7. #7
    Я люблю суп abarth's Avatar
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    Quote Originally Posted by miamijim View Post
    +1. Surprisingly you'll need thoroughly clean all of the shifter internals and then lubricate everything. Sometimes on rare occasions a flexy frame can cause ghost shifting into a higher gear.
    Do not lubricate the shifter internals!!! +1 on the frame flex ghost shifting.

  8. #8
    Senior Member RavingManiac's Avatar
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    Add a little friction to the friction shifter.

  9. #9
    Senior Member surreal's Avatar
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    +1 to the notions re: the shifter may be at fault, and that flex can cause it, BUT does the ghost shifting only occur in one of the rear cogs? Did you adjust the limit screws?

    -rob

  10. #10
    Senior Member Thumpic's Avatar
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    Quote Originally Posted by RavingManiac View Post
    Add a little friction to the friction shifter.
    +1.............clean and LIGHTLY lube everything; then add friction enough to maintain your shifter/derailleur position.......
    Thumpic....

    Green is the new "CHEAP"

  11. #11
    No, your OTHER left!! bikenut2011's Avatar
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    Quote Originally Posted by Thumpic View Post
    +1.............clean and LIGHTLY lube everything; then add friction enough to maintain your shifter/derailleur position.......
    sounds good, i wondered if i could tighten it up a little.

    will try all these things, btw i have a new shimano 6-7-8 speed chain on there, just installed yesterday

    Thanks guys

    !andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  12. #12
    Senior Member Thumpic's Avatar
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    be sure to keep track of the position and direction of the friction plates in the shifter; if you've never done it before.....it can be a PITA if you get them out of order. In fact; I would recommend doing one side at a time.....in case you need to use the other for reference...

    don't ask me how i know these things..........
    Thumpic....

    Green is the new "CHEAP"

  13. #13
    Senior Member mazdaspeed's Avatar
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    One time I took a shifter apart, cleaned it, and lightly lubed it. It never held a gear again, no matter what I tried to do. Be careful lubricating DT shifters.

  14. #14
    No, your OTHER left!! bikenut2011's Avatar
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    Quote Originally Posted by surreal View Post
    +1 to the notions re: the shifter may be at fault, and that flex can cause it, BUT does the ghost shifting only occur in one of the rear cogs? Did you adjust the limit screws?

    -rob
    No, it occurred in several gears. I'm definitely thinking shifter needs more friction now, I'll post back with the outcome tomorrow probably. Thanks everyone

    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  15. #15
    No, your OTHER left!! bikenut2011's Avatar
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    Quote Originally Posted by mazdaspeed View Post
    One time I took a shifter apart, cleaned it, and lightly lubed it. It never held a gear again, no matter what I tried to do. Be careful lubricating DT shifters.
    Hmmm, good to know!!! can i just tighten it up a little? doesnt it have a screw on the side?

    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  16. #16
    Senior Member mazdaspeed's Avatar
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    Quote Originally Posted by bikenut2011 View Post
    Hmmm, good to know!!! can i just tighten it up a little? doesnt it have a screw on the side?

    ~andy
    Depends what kind of shifter it is, but just try tightening it first since that's easy and non-intrusive. It's highly possible that's all that's wrong.

  17. #17
    Senior Member Thumpic's Avatar
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    Quote Originally Posted by bikenut2011 View Post
    Hmmm, good to know!!! can i just tighten it up a little? doesnt it have a screw on the side?

    ~andy
    depending on the brand it may have a "D" ring (see pic) on the lever that you can tighten by hand. It may simply need adjusting. I'd sure try tightening it up before I took the shifter apart....

    d ring.jpg
    Thumpic....

    Green is the new "CHEAP"

  18. #18
    Senior Member RavingManiac's Avatar
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    Quote Originally Posted by bikenut2011 View Post
    Hmmm, good to know!!! can i just tighten it up a little? doesnt it have a screw on the side?

    ~andy
    I think we've been assuming you knew about adding friction. The screw in the shift lever can be tightened or loosened to add or detract friction. What I do is shift onto the smallest cog, then push the shift lever foward about half way not turning the crank so the chain stays on the smallest cog. the shift should stay half way forward on it's own. If it doesn't, tighten the screw until it does. Then loosen it to see at what point it releases and moves back on it's own. From that point I tighten until it barely holds and then another quarter turn. Test ride with a screwdriver handy and tighten while riding if necessary.

  19. #19
    No, your OTHER left!! bikenut2011's Avatar
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    Quote Originally Posted by RavingManiac View Post
    I think we've been assuming you knew about adding friction. The screw in the shift lever can be tightened or loosened to add or detract friction. What I do is shift onto the smallest cog, then push the shift lever foward about half way not turning the crank so the chain stays on the smallest cog. the shift should stay half way forward on it's own. If it doesn't, tighten the screw until it does. Then loosen it to see at what point it releases and moves back on it's own. From that point I tighten until it barely holds and then another quarter turn. Test ride with a screwdriver handy and tighten while riding if necessary.



    AWESOME! will do. Yes, this is the first bike i've ever had with friction shifters... I'm a total noob to them!!

    Will try this tomorrow after work.

    They are basic suntour shifters btw

    Thanks so much !!



    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  20. #20
    Senior Member RavingManiac's Avatar
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    Once you know, it's simple. Basic Suntour DT shifters are excellent and can be habit forming.

  21. #21
    WNG
    WNG is offline
    Spin Forest! Spin! WNG's Avatar
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    The rear piece of cable housing you installed, is it linear indexing housing or standard spiral (brake) housing? Being a friction set up, using spiral housing may be in your favor.
    “You meet the nicest people on two wheels!"
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  22. #22
    No, your OTHER left!! bikenut2011's Avatar
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    Quote Originally Posted by WNG View Post
    The rear piece of cable housing you installed, is it linear indexing housing or standard spiral (brake) housing? Being a friction set up, using spiral housing may be in your favor.

    actually the mechanic at the LBS installed it. to make a long story short, or long, i took the chain off the bike to give it a good washing and lube. I went down to the LBS for a quick link and we found that none of the links they had would fit the original chain on my schwinn. I told the guy to just throw on a 6-7-8 chain that they carried and be done with it. Then he talked me into the new cable and housing, telling me it would shift so much better. And he was right, it definitely shifts better, but now i am getting the ghost shifting.

    im sure the housing he used is for indexed modern bikes...did not know that would make any difference, and stupid me, i didnt even save the original piece that came off the bike!!

    I'm going to try to tighten up the shifter tomorrow. we will see...

    ~andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

  23. #23
    No, your OTHER left!! bikenut2011's Avatar
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    Looks like the problem was the friction shifter for sure. I tightened the screw slightly this morning and it seems to be holding in the gears. Of course the real test will be on the road, but i'm 99% sure it was the shifter now. And it all makes sense now. Thanks very much for all the guidance, not being used to dealing with friction shifters, all i could think of was there must be something off with the derailleur or switching from 6 to 7 speeds had something to do with it.

    Thanks Everyone!!!



    andy
    Bike Hoarder in Training :)

    1988 Schwinn Circuit (Red, White, 'n' Chrome... American made Hot Rod! )
    1986 Schwinn Prelude now a 14 spd (survivor bike, almost mint)
    2009 Motobecane 27 spd Flat bar (too small for me, now wifey's ride)
    2011 Motobecane 18 spd Cross Bike turned road bike (my "modern" ride)
    1973 Schwinn Continental... 36 pounds and yellow (for my son) :)

    My C&V pics here
    My daily mile page is here

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