Question on 1970 Bultaco Matador

Discussion in '2 smokers' started by redblk63, Oct 4, 2012.

  1. redblk63

    redblk63 TacoDog

    Joined:
    Sep 12, 2012
    Oddometer:
    6
    Location:
    Pasadena, CA
    I have just begun work on a Mk IV Matador I have had in the back yard since 1979. Picture of frame below. (Oops, "You may not post attachments") My question is about the lower triple clamp.

    When I removed it from the frame, it came away with the steering stem. So far, so good. The problem is that it can rotate about the steering stem, and that joint is a bit loose (it wobbles).

    How are those parts meant to be joined together? I would have guessed they could be welded together, but maybe they were a press fit, or threaded, or ?

    I am currently mystified, and any help will be appreciated.

    Thanks,
    Larry - Pasadena
    1970 Matador (resuscitating)
    1969 Matador (just a rider, Snowy Trail veteran)
    Hondas
    #1
  2. Twin-shocker

    Twin-shocker Long timer

    Joined:
    Jan 28, 2012
    Oddometer:
    1,673
    If the lower yoke is alloy then the stem will be a press fit, if its steel can also be press fit or may be welded.
    #2
  3. redblk63

    redblk63 TacoDog

    Joined:
    Sep 12, 2012
    Oddometer:
    6
    Location:
    Pasadena, CA
    Thanks twin shock. It is a magnetic metal, so I will investigate further. It's really loose, about 10 degrees of wobble. May need to use a fixture to insure right angle if it needs welding.

    Larry - pasadena
    #3
  4. Strong Bad

    Strong Bad n00balicious

    Joined:
    Oct 29, 2007
    Oddometer:
    5,929
    Location:
    Santa Susana, CA
    I'm guessing press fit.

    You can post pictures by using a picture/file sharing host site like Photobucket. They are free and easy to use
    #4
  5. Twin-shocker

    Twin-shocker Long timer

    Joined:
    Jan 28, 2012
    Oddometer:
    1,673
    If its 10 degrees I would suggest either properly repairing the worn or damaged part, or a used replacement. Welding it when there is that much movement, will mean distortion is almost certain.
    #5
  6. blaine.hale

    blaine.hale Long timer

    Joined:
    Feb 28, 2009
    Oddometer:
    3,580
    Location:
    Atlanta, Ga
    Pick one up off ebay. They pop up every now and again. It's definitely a press fit, in wich case, welding could interfere with the inner race/bearings. Sounds like someone may have been a bit rough on riding that matador :)
    #6