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BB help on old Motobecane

Started by Walt Shekrota · · Last activity · 37 posts · 2,375 views

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Cycling Equipment
Published
5 April 2008
Last activity
9 April 2008
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Walt Shekrota
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  1. <posted & mailed>

    Hi,

    I noticed my bottom bracket stopped adjusting some time ago. The drive side
    retains an up/down click travel while tightening slightly more binds the
    bearings ie rumble.
    I see on the sheldonbrown/harris site cups are available but I'm not sure
    they are the same I figured new cups and 1/4" balls 11 a side might get it
    back in tolerance.
    The outer ring is marked 'tange japan 35xp1' it might also say S1 or 81 not
    sure. The cups do look exactly like those at harris,
    http://sheldonbrown.com/harris/bottombrackets.html
    The bike was original purchased by me I think in 1978 a grand jubile
    motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    Thanks for any help!
    -Walt

  2. Walt Shekrota said:

    <posted & mailed>

    Hi,

    I noticed my bottom bracket stopped adjusting some time ago. The drive side
    retains an up/down click travel while tightening slightly more binds the
    bearings ie rumble.
    I see on the sheldonbrown/harris site cups are available but I'm not sure
    they are the same I figured new cups and 1/4" balls 11 a side might get it
    back in tolerance.
    The outer ring is marked 'tange japan 35xp1'  it might also say S1 or 81not
    sure. The cups do look exactly like those at harris,http://sheldonbrown.com/harris/bottombrackets.html
    The bike was original purchased by me I think in 1978 a grand jubile
    motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Nashbar still has their excellent house brand BBs on sale for $15, or
    if you're in a rush, just have your LBS throw something in there, like
    a Shimano UN53/73.

    Again, I'm not absolutely sure that it's English--but there's a good
    chance it is.

  3. landotter said:
    Walt Shekrota said:

    <posted & mailed>

    Hi,

    I noticed my bottom bracket stopped adjusting some time ago. The drive
    side retains an up/down click travel while tightening slightly more binds
    the bearings ie rumble.
    I see on the sheldonbrown/harris site cups are available but I'm not sure
    they are the same I figured new cups and 1/4" balls 11 a side might get
    it back in tolerance.
    The outer ring is marked 'tange japan 35xp1'  it might also say S1 or 81
    not sure. The cups do look exactly like those at
    harris,http://sheldonbrown.com/harris/bottombrackets.html The bike was
    original purchased by me I think in 1978 a grand jubile motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Nashbar still has their excellent house brand BBs on sale for $15, or
    if you're in a rush, just have your LBS throw something in there, like
    a Shimano UN53/73.

    Again, I'm not absolutely sure that it's English--but there's a good
    chance it is.

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Thanks.
    -Walt

  4. Walt Shekrota said:
    landotter said:
    Walt Shekrota said:

    <posted & mailed>

    Quoted message said:
    Quoted message said:

    Hi,

    Quoted message said:
    Quoted message said:

    I noticed my bottom bracket stopped adjusting some time ago. The drive
    side retains an up/down click travel while tightening slightly more binds
    the bearings ie rumble.
    I see on the sheldonbrown/harris site cups are available but I'm not sure
    they are the same I figured new cups and 1/4" balls 11 a side might get
    it back in tolerance.
    The outer ring is marked 'tange japan 35xp1'  it might also say S1 or81
    not sure. The cups do look exactly like those at
    harris,http://sheldonbrown.com/harris/bottombrackets.htmlThe bike was
    original purchased by me I think in 1978 a grand jubile motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    Quoted message said:

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Quoted message said:

    Nashbar still has their excellent house brand BBs on sale for $15, or
    if you're in a rush, just have your LBS throw something in there, like
    a Shimano UN53/73.

    Quoted message said:

    Again, I'm not absolutely sure that it's English--but there's a good
    chance it is.

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?


    Thread direction and pitch vary. English is overwhelmingly the most
    common with Italian bagging in the rear. There have been numerous
    other "standards" as well. Motobecane, like a lot of other bike
    companies, started hanging Shimano and Suntour on their bikes in the
    late 70s/ early 80s, thus your SR crank and my hunch that it's English
    thread.

  5. Walt Shekrota said:
    Quoted message said:
    Quoted message said:

    I noticed my bottom bracket stopped adjusting some time ago. The
    drive side retains an up/down click travel while tightening
    slightly more binds the bearings ie rumble.

    Quoted message said:
    Quoted message said:
    Quoted message said:

    I see on the sheldonbrown/harris site cups are available but I'm
    not sure they are the same I figured new cups and 1/4" balls 11 a
    side might get it back in tolerance.

    Quoted message said:
    Quoted message said:
    Quoted message said:

    The outer ring is marked 'tange japan 35xp1'  it might also say S1
    or 81 not sure. The cups do look exactly like those at
    harris,http://sheldonbrown.com/harris/bottombrackets.html The bike
    was original purchased by me I think in 1978 a grand jubile
    motobecane. The cranks are SR.

    Quoted message said:
    Quoted message said:
    Quoted message said:

    Am I on the right track? cups and bearings? How can I be sure they
    are right?

    Quoted message said:
    Quoted message said:

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Quoted message said:
    Quoted message said:

    Nashbar still has their excellent house brand BBs on sale for $15,
    or if you're in a rush, just have your LBS throw something in
    there, like a Shimano UN53/73.

    Quoted message said:
    Quoted message said:

    Again, I'm not absolutely sure that it's English--but there's a
    good chance it is.

    Quoted message said:

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    http://draco.acs.uci.edu/rbfaq/FAQ/8f.8.html

    Jobst Brandt

  6. Bonjour,

    [email hidden] a écrit :

    Quoted message said:
    Quoted message said:

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Quoted message said:

    http://draco.acs.uci.edu/rbfaq/FAQ/8f.8.html

    Motobecane french bike was with :
    - 1.370" x 24 F tpi (BSC)
    - but, the right cup was with a screw thread to the left and no right
    nonetheless !

    --
    Cordialement
    Jean Pasquet
    [On respecte un homme qui se respecte lui-même] Honoré de Balzac
    (pour réponse, remettre les 3 voyelles de mon nom)

  7. Walt Shekrota said:

    The outer ring is marked 'tange japan 35xp1' it might also say S1 or 81 not
    sure. The cups do look exactly like those at harris,
    http://sheldonbrown.com/harris/bottombrackets.html

    If it says 35x1 I would be confident that it's French Thread.

    Quoted message said:

    The bike was original purchased by me I think in 1978 a grand jubile
    motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    I would look for a replacement set of cups, cones, and axle on Ebay.
    Chances are that they are all bad - although sometimes the axles
    survive.

    You can likely use a vintage Stronglight or TA BB. There might be some
    minor differences in taper though... someone else would need to
    comment on Japanese vs. French/Euro tapers.

    Pull it apart. Measure it as shown in this diagram:
    http://sheldonbrown.com/harris/bottombrackets.html#axles

    Post the dimensions.

  8. landotter said:
    Walt Shekrota said:
    landotter said:

    On Apr 5, 1:14 pm, Walt Shekrota <[email hidden]> wrote:
    > <posted & mailed>

    Quoted message said:

    > Hi,

    Quoted message said:

    > I noticed my bottom bracket stopped adjusting some time ago. The drive
    > side retains an up/down click travel while tightening slightly more
    > binds the bearings ie rumble.
    > I see on the sheldonbrown/harris site cups are available but I'm not
    > sure they are the same I figured new cups and 1/4" balls 11 a side
    > might get it back in tolerance.
    > The outer ring is marked 'tange japan 35xp1'  it might also say S1 or
    > 81 not sure. The cups do look exactly like those at
    > harris,http://sheldonbrown.com/harris/bottombrackets.htmlThe bike was
    > original purchased by me I think in 1978 a grand jubile motobecane.
    > The cranks are SR.
    > Am I on the right track? cups and bearings? How can I be sure they are
    > right?

    Quoted message said:

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Quoted message said:

    Nashbar still has their excellent house brand BBs on sale for $15, or
    if you're in a rush, just have your LBS throw something in there, like
    a Shimano UN53/73.

    Quoted message said:

    Again, I'm not absolutely sure that it's English--but there's a good
    chance it is.

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?


    Thread direction and pitch vary. English is overwhelmingly the most
    common with Italian bagging in the rear. There have been numerous
    other "standards" as well. Motobecane, like a lot of other bike
    companies, started hanging Shimano and Suntour on their bikes in the
    late 70s/ early 80s, thus your SR crank and my hunch that it's English
    thread.

    I'm a little confused, it appears that english has opposing threads so how
    is a cartridge possible threading all the way through?
    Although I still have not gotten the drive side out I cannot confirm this.

    Seems french and italian are both right turn on either side to tighten this
    way a cart could screw all the way through for them?

    Thanks.
    -Walt

  9. Jean Pasquet said:

    Bonjour,

    [email hidden] a écrit :

    Quoted message said:
    Quoted message said:

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Quoted message said:

    http://draco.acs.uci.edu/rbfaq/FAQ/8f.8.html

    Motobecane french bike was with :
    - 1.370" x 24 F tpi (BSC)
    - but, the right cup was with a screw thread to the left and no right
    nonetheless !

    Ok in that doc it says

    "The type of thread is usually marked on the face of both left
    and right cups."

    Mine say the same 35xP1 on either ring. So does it follow that the right or
    drive side also tightens to the right or comes off to the left as a french?
    I say this because the above implies the threads are the same if marked the
    same.
    Now if I take that a step further I would think a cartridge BB would only
    work in a french or italian that could thread straight through both sides
    instead of encountering opposing thread as in english.

    Thanks
    -Walt

  10. Walt Shekrota said:
    landotter said:
    Walt Shekrota said:

    landotter wrote:
    > On Apr 5, 1:14 pm, Walt Shekrota <[email hidden]> wrote:
    >> <posted & mailed>

    Quoted message said:
    Quoted message said:

    >> Hi,

    Quoted message said:
    Quoted message said:

    >> I noticed my bottom bracket stopped adjusting some time ago. The drive
    >> side retains an up/down click travel while tightening slightly more
    >> binds the bearings ie rumble.
    >> I see on the sheldonbrown/harris site cups are available but I'm not
    >> sure they are the same I figured new cups and 1/4" balls 11 a side
    >> might get it back in tolerance.
    >> The outer ring is marked 'tange japan 35xp1'  it might also say S1or
    >> 81 not sure. The cups do look exactly like those at
    >> harris,http://sheldonbrown.com/harris/bottombrackets.htmlThebike was
    >> original purchased by me I think in 1978 a grand jubile motobecane.
    >> The cranks are SR.
    >> Am I on the right track? cups and bearings? How can I be sure they are
    >> right?

    Quoted message said:
    Quoted message said:

    > Those are most likely correct as a quick check indicates that
    > Motobecane exported bike with English BBs. If that's the case--I'd
    > dispense with the stone age cup and cone system, and replace the
    > entire assembly with a cartridge BB.

    Quoted message said:
    Quoted message said:

    > Nashbar still has their excellent house brand BBs on sale for $15, or
    > if you're in a rush, just have your LBS throw something in there, like
    > a Shimano UN53/73.

    Quoted message said:
    Quoted message said:

    > Again, I'm not absolutely sure that it's English--but there's a good
    > chance it is.

    Quoted message said:
    Quoted message said:

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Quoted message said:

    Thread direction and pitch vary. English is overwhelmingly the most
    common with Italian bagging in the rear. There have been numerous
    other "standards" as well. Motobecane, like a lot of other bike
    companies, started hanging Shimano and Suntour on their bikes in the
    late 70s/ early 80s, thus your SR crank and my hunch that it's English
    thread.

    I'm a little confused, it appears that english has opposing threads so how
    is a cartridge possible threading all the way through?

    Fixed cup cart screws in normally from drive side, left locking cup
    screws in CCW. (in most cases, see below)

    http://parktool.com/repair/readhowto.asp?id=94

  11. still just me said:

    On Sat, 05 Apr 2008 14:14:37 -0400, Walt Shekrota

    Quoted message said:

    The outer ring is marked 'tange japan 35xp1'  it might also say S1 or 81 not
    sure. The cups do look exactly like those at harris,
    http://sheldonbrown.com/harris/bottombrackets.html

    If it says 35x1 I would be confident that it's French Thread.

    Quoted message said:

    The bike was original purchased by me I think in 1978 a grand jubile
    motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    I would look for a replacement set of cups, cones, and axle on Ebay.
    Chances are that they are all bad - although sometimes the axles
    survive.

    You can likely use a vintage Stronglight or TA BB. There might be some
    minor differences in taper though... someone else would need to
    comment on Japanese vs. French/Euro tapers.

    SR cranks are Japanese, no need to add to the confusion. This is a
    fifteen dollar five minute fix.

  12. Walt Shekrota said:
    Quoted message said:
    Quoted message said:

    > What is the difference in these? Is it thread direction? Choices
    > are eng/french/swiss?

    http://draco.acs.uci.edu/rbfaq/FAQ/8f.8.html

    Quoted message said:
    Quoted message said:

    Motobecane french bike was with :
    - 1.370" x 24 F tpi (BSC)
    - but, the right cup was with a screw thread to the left and no
    right nonetheless !

    Quoted message said:

    Ok in that doc it says

    Quoted message said:

    "The type of thread is usually marked on the face of both left and
    right cups."

    Quoted message said:

    Mine say the same 35xP1 on either ring. So does it follow that the
    right or drive side also tightens to the right or comes off to the
    left as a french? I say this because the above implies the threads
    are the same if marked the same.

    Just a quick viaual inspection should make obvious whether the tread
    in quaetion is left or right. THey usually don't indicate that but
    only give the thread pitch (metric/English) units. English is threads
    per inch (TPI) and metric gives thread pitch in mm.

    Quoted message said:

    Now if I take that a step further I would think a cartridge BB would
    only work in a french or italian that could thread straight through
    both sides instead of encountering opposing thread as in english.

    It's the cup that holds the cartridge bearing that counts, not the
    bearing.

    Jobst Brandt

  13. "landotter" <[email hidden]> wrote in message
    news:[email hidden]...

    Walt Shekrota said:
    landotter said:
    Walt Shekrota said:

    <posted & mailed>

    Quoted message said:
    Quoted message said:

    Hi,

    Quoted message said:
    Quoted message said:

    I noticed my bottom bracket stopped adjusting some time ago. The


    drive

    Quoted message said:
    Quoted message said:
    Quoted message said:

    side retains an up/down click travel while tightening slightly more


    binds

    Quoted message said:
    Quoted message said:
    Quoted message said:

    the bearings ie rumble.
    I see on the sheldonbrown/harris site cups are available but I'm not


    sure

    Quoted message said:
    Quoted message said:
    Quoted message said:

    they are the same I figured new cups and 1/4" balls 11 a side might


    get

    Quoted message said:
    Quoted message said:
    Quoted message said:

    it back in tolerance.
    The outer ring is marked 'tange japan 35xp1' it might also say S1 or


    81

    Quoted message said:
    Quoted message said:
    Quoted message said:

    not sure. The cups do look exactly like those at
    harris,http://sheldonbrown.com/harris/bottombrackets.htmlThe bike was
    original purchased by me I think in 1978 a grand jubile motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they


    are

    Quoted message said:
    Quoted message said:
    Quoted message said:

    right?

    Quoted message said:

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Quoted message said:

    Nashbar still has their excellent house brand BBs on sale for $15, or
    if you're in a rush, just have your LBS throw something in there, like
    a Shimano UN53/73.

    Quoted message said:

    Again, I'm not absolutely sure that it's English--but there's a good
    chance it is.

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Thread direction and pitch vary. English is overwhelmingly the most
    common with Italian bagging in the rear. There have been numerous
    other "standards" as well. Motobecane, like a lot of other bike
    companies, started hanging Shimano and Suntour on their bikes in the
    late 70s/ early 80s, thus your SR crank and my hunch that it's English
    thread.

    35xP1 is METRIC! 35mm x 1mm PITCH.

    SI is French for Système international or ISO - the International
    Organization for Standardization.

    I have a collection of older Motobecanes form the 70s and early 80s.They
    all have metric BB threads, either French or Swiss threads. The difference
    being Swiss fixed cups have Left Hand threads and French are Right Hand.

    Both my 1974 Grand Jubiles have French BBs. My 1980 Grand Jubile has a
    Swiss BB as does my 1982 Grand Record. My 1978 and 1982 Team Champions
    both have French BB. Some later Motobecanes came with English BBs.

    Chas.

  14. "Walt Shekrota" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:
    Jean Pasquet said:

    Bonjour,

    [email hidden] a écrit :

    Quoted message said:

    > What is the difference in these? Is it thread direction? Choices are
    > eng/french/swiss?

    Quoted message said:

    http://draco.acs.uci.edu/rbfaq/FAQ/8f.8.html

    Motobecane french bike was with :
    - 1.370" x 24 F tpi (BSC)
    - but, the right cup was with a screw thread to the left and no right
    nonetheless !

    Ok in that doc it says

    "The type of thread is usually marked on the face of both left
    and right cups."

    Mine say the same 35xP1 on either ring. So does it follow that the right


    or

    Quoted message said:

    drive side also tightens to the right or comes off to the left as a


    french?

    Quoted message said:

    I say this because the above implies the threads are the same if marked


    the

    Quoted message said:

    same.
    Now if I take that a step further I would think a cartridge BB would


    only

    Quoted message said:

    work in a french or italian that could thread straight through both


    sides

    Quoted message said:

    instead of encountering opposing thread as in english.

    Thanks
    -Walt

    35xP1 is METRIC = 35mm x 1mm PITCH.

    SI is French for Système international or ISO - the International
    Organization for Standardization.

    I have a collection of older Motobecanes form the 70s and early 80s.They
    all have metric BB threads, either French or Swiss threads. The difference
    being Swiss fixed cups have Left Hand threads and French are Right Hand.

    Both my 1974 Grand Jubiles have French BBs. My 1980 Grand Jubile has a
    Swiss BB as does my 1982 Grand Record. My 1978 and 1982 Team Champions
    both have French BB. Some later Motobecanes came with English BBs.

    You can also get a Phil sealed bearing BB which are expensive but will
    last for years of trouble free service. One of the early Shimano sealed
    bearing BBs with removable cups on both sides will also work with Phil
    French cups. You'll need to use a BB with the same length and style of
    taper as your original spindle.

    Chas.

  15. "Jean Pasquet" <[email hidden]> wrote in message
    news:mn.2d427d84a919e35b.46505@Cycles...

    Quoted message said:

    Bonjour,

    [email hidden] a écrit :

    Quoted message said:
    Quoted message said:

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Quoted message said:

    http://draco.acs.uci.edu/rbfaq/FAQ/8f.8.html

    Motobecane french bike was with :
    - 1.370" x 24 F tpi (BSC)
    - but, the right cup was with a screw thread to the left and no right
    nonetheless !

    --
    Cordialement
    Jean Pasquet
    [On respecte un homme qui se respecte lui-même] Honoré de Balzac
    (pour réponse, remettre les 3 voyelles de mon nom)

    1.370" = 34.789mm

    24 tpi = .0417" = 10.058mm

    The threads on bicycle bottom brackets are not always very accurate. These
    threads are so close that some one could easily force an English fixed cup
    into a Swiss metric BB. I had a frame that someone tried to do that. I was
    fortunate to be able to chase the threads with a metric BB tap and fix the
    problem.

    Chas.

  16. * * Chas said:

    "landotter" <[email hidden]> wrote in message

    news:[email hidden]...

    Walt Shekrota said:
    landotter said:

    On Apr 5, 1:14 pm, Walt Shekrota <[email hidden]> wrote:
    > <posted & mailed>

    Quoted message said:
    Quoted message said:

    > Hi,

    Quoted message said:
    Quoted message said:

    > I noticed my bottom bracket stopped adjusting some time ago. The


    drive

    Quoted message said:
    Quoted message said:

    > side retains an up/down click travel while tightening slightly more


    binds

    Quoted message said:
    Quoted message said:

    > the bearings ie rumble.
    > I see on the sheldonbrown/harris site cups are available but I'm not


    sure

    Quoted message said:
    Quoted message said:

    > they are the same I figured new cups and 1/4" balls 11 a side might


    get

    Quoted message said:
    Quoted message said:

    > it back in tolerance.
    > The outer ring is marked 'tange japan 35xp1' it might also say S1 or


    81

    Quoted message said:
    Quoted message said:

    > not sure. The cups do look exactly like those at
    > harris,http://sheldonbrown.com/harris/bottombrackets.htmlThebike was
    > original purchased by me I think in 1978 a grand jubile motobecane.
    > The cranks are SR.
    > Am I on the right track? cups and bearings? How can I be sure they


    are

    Quoted message said:
    Quoted message said:

    > right?

    Quoted message said:
    Quoted message said:

    Those are most likely correct as a quick check indicates that
    Motobecane exported bike with English BBs. If that's the case--I'd
    dispense with the stone age cup and cone system, and replace the
    entire assembly with a cartridge BB.

    Quoted message said:
    Quoted message said:

    Nashbar still has their excellent house brand BBs on sale for $15, or
    if you're in a rush, just have your LBS throw something in there, like
    a Shimano UN53/73.

    Quoted message said:
    Quoted message said:

    Again, I'm not absolutely sure that it's English--but there's a good
    chance it is.

    Quoted message said:

    What is the difference in these? Is it thread direction? Choices are
    eng/french/swiss?

    Quoted message said:

    Thread direction and pitch vary. English is overwhelmingly the most
    common with Italian bagging in the rear. There have been numerous
    other "standards" as well. Motobecane, like a lot of other bike
    companies, started hanging Shimano and Suntour on their bikes in the
    late 70s/ early 80s, thus your SR crank and my hunch that it's English
    thread.

    35xP1 is METRIC! 35mm x 1mm PITCH.

    SI is French for Système international or ISO - the International
    Organization for Standardization.

    D'oh.

  17. Walt Shekrota said:

    <posted & mailed>

    Hi,

    I noticed my bottom bracket stopped adjusting some time ago. The drive side
    retains an up/down click travel while tightening slightly more binds the
    bearings ie rumble.
    I see on the sheldonbrown/harris site cups are available but I'm not sure
    they are the same I figured new cups and 1/4" balls 11 a side might get it
    back in tolerance.
    The outer ring is marked 'tange japan 35xp1' it might also say S1 or 81 not
    sure. The cups do look exactly like those at harris,
    http://sheldonbrown.com/harris/bottombrackets.html
    The bike was original purchased by me I think in 1978 a grand jubile
    motobecane.
    The cranks are SR.
    Am I on the right track? cups and bearings? How can I be sure they are
    right?

    Thanks for any help!
    -Walt

    Mr. Muzi sent the following to me to post due to temporary Usenet access
    problems:

    "Reynolds/Columbus tube bikes in 1978 are French (SI) threaded as
    someone noted, m35xP1 with both cups right thread. Models are Gran
    Jubilee, Gran Record, Le Champion and Team Champion.

    Not-premium frames are Swiss thread, (Nobly, Mirage, Jubilee Sport etc)
    which is the logically best design, being SI and m35x1 but with a
    reversed right cup (denoted as m35x1G for 'gauche'😉. Of course it is by
    far the least common of all threads for replacement parts.

    No 1978 Motobécanes are BSC so no current cheap cartridge BB sets will
    fit. The current Asian models (also sold as 'Mercier'😉 are unrelated to
    the French manufacturer."

    --
    Tom Sherman - Holstein-Friesland Bovinia
    The weather is here, wish you were beautiful

  18. Tom Sherman said:

    No 1978 Motobécanes are BSC so no current cheap cartridge BB sets will
    fit. The current Asian models (also sold as 'Mercier'😉 are unrelated to
    the French manufacturer."

    So, back to my post. Find a French TA or Stronglight BB on Ebay. Get a
    complete BB.

    But, those axle dimensions are important. If you post them, someone
    can comment on what french axle will fit.

    The JIS taper question remains.

  19. Bonjour,

    Walt Shekrota a écrit :

    Quoted message said:

    Jean Pasquet wrote:

    Quoted message said:
    Quoted message said:

    Motobecane french bike was with :
    - 1.370" x 24 F tpi (BSC)
    - but, the right cup was with a screw thread to the left and no right
    nonetheless !

    Quoted message said:

    Ok in that doc it says

    Quoted message said:

    "The type of thread is usually marked on the face of both left
    and right cups."

    Yes, but french bike old, in epoch, there was in France several "norms
    "! - norms french - coeducational norms with thread English and not
    French - conversely thread French and not BSC!

    I had Motobécane bike with thread french and thread left on the right
    cup!

    --
    Cordialement
    Jean Pasquet
    [On respecte un homme qui se respecte lui-même] Honoré de Balzac
    (pour réponse, remettre les 3 voyelles de mon nom)


  20. Quoted message said:
    Quoted message said:


    I'm a little confused, it appears that english has opposing threads so
    how is a cartridge possible threading all the way through?

    Fixed cup cart screws in normally from drive side, left locking cup


    (I assume you mean left locking on the right side)**************

    Quoted message said:

    screws in CCW. (in most cases, see below)

    http://parktool.com/repair/readhowto.asp?id=94

    So looks like these carts only work with english or swiss threaded bikes?
    Or do they come with varying thread styles?
    italian right right
    english left right
    french right right
    swiss left right
    where the left cup (or non drive side) always has a right turn to tighten no
    matter what type.

    I thought cartridges were one piece thus straight through but looking at
    your Park URL I see they go together in 2 piece so it will depend on what
    is supplied for cart threading.

    I'm thinking for my french the cartridge may not be possible at all and I
    have to get the old replacement parts.

    Thanks.
    -Walt

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