Changing head tube,is this possible?

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by runnermike, Sep 12, 2013.

  1. runnermike

    runnermike New Member

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  2. Scott.D.Lang

    Scott.D.Lang Member

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    Re: Is this possible?

    Id say yes but I tell you who to talk to that can give you the pros and cons that would be labrat I believe he uses head tubs off of different bikes all the time
     
  3. runnermike

    runnermike New Member

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    Re: Is this possible?

    Ok....thanks for the heads up.
     
  4. buba

    buba Member

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    Re: Is this possible?

    mike
    I have very successfully sliced bmx head tubes vertically and welded and assortment of other longer and of different diameter head tubes -- run a weld bead along both side --super strong grind to you aesthetic pleasure

    also have the luxury or changing angle slightly and setting height as you desire
     
  5. 16v4nrbrgr

    16v4nrbrgr New Member

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    Re: Is this possible?

    Never grind a structural weld.
     
  6. runnermike

    runnermike New Member

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    Re: Is this possible?

    I just want to know if I can cut off the 1" head tube and weld in a 1 1/8" head tube. I have a welding shop right around the corner from me.
     
  7. Tool Maker

    Tool Maker New Member

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    Re: Is this possible?

    runnermike:

    Yes, you certainly can.

    take your time, and cut the old head tube away from the welds. Leave the welds on the frame tube.

    Then carefully grind back the welds to virgin tube, while shaping the end of the tube to meet the new head tube. You want a very close fit to the radius of the new tube. The better this fits, the better the weld.

    If you take it to a welder & it fits very close, the welder will be happy. Be sure to sand the paint back at least 2 inches from the joint. TIG welders like to see clean bare metal in the weld zone. Sand any rust from inside the frame tubes at the end as well.

    Prep work is the most important part of welding. if you take dirty, poorly fitted parts to a weld shop, they will grab the MIG and butter them together because the arc will scour the crud & rust while filling the big gaps.

    .
     
  8. allen standley

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    Re: Is this possible?

    I just did this exact same thing!!! You will love the solid feel of that triple tree. Mine is a Fito purchased thru Amazon. I didn't have a doner steel frame to take from so I bought a length of 1 1/8 x 6" from metal yard. I was lucky I had the head parts - Bearings , race, cups, bar holder and spacers. already. That stuff is $$$$. Good luck.
     
  9. runnermike

    runnermike New Member

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    Re: Is this possible?

    Well....after much consideration....I think I am just going to swap out the steerer tube on the triple trees. Will be much easier and do not have to cut and weld the frame. I'm sure I could easily just purchase new triple tree forks, but I got a deal on these and they are some BEEFY sumb#$%hes!!!!! lol
     
  10. KCvale

    KCvale Active Member

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    Re: Is this possible?

    Man I can't stand triple tree forks on a ride.
    Besides killing the turning radius and denting the gas tank that 'solid feel' ride is like a brick and they usually leave you few inexpensive braking options.

    Triple trees look cool but I'll take a mountain bike front fork with V and disc brake bosses on it over anything.
    Great strength, really great ride, and good cheap brake options.
    There are plenty that will drop in a 1" beach cruiser using the original forks hardware, I can typically get one for ~$50 from my local bike shop.

    Anyway that's just just me, I look forward to seeing how yours turns out as I do really like the 'chopper' look, just on someone elses ride ;-}
     
    #10 KCvale, Sep 16, 2013
    Last edited: Sep 16, 2013
  11. runnermike

    runnermike New Member

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    Re: Is this possible?

    Thanks for the input KC. My triple trees have the disc brake tab, so I have good brake options. This build is going to just be a cruiser. Not going to be flying around any corners or anything like that......lol
     
  12. allen standley

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    Re: Is this possible?

    I respect that--- to each his own
     
  13. KCvale

    KCvale Active Member

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    Re: Is this possible?

    The trees this customer put on his bike before he brought it for motorizing were way to long but half the time that is what the customer with TT's wants so a side pull is out but like most all has a disc boss.

    [​IMG]

    The Macargi TOS3.0 has 24" wheels with a gazillion spokes and there is no hub for that my bike shop could find would take a disc so new wheel.
    $145 installed by the shop (disc wheel and caliper) so that is not a cheap good brake option with triple tree fork but a darn good one.

    Different color rim (Macargi and their red rims, ergh) but 26" and 36 black spokes so his old style speedo will be true and a larger front wheel is common on choppers.

    Speaking of the old wheel if anyone is interested in it contact me.

    [​IMG]

    With the customer desired big Wizzer tank that chopper is getting, it's over all wheelbase, and the T's limiting turning this thing will need a whole parking lot to do a U turn in, heck even moving it around the shop is a pain ya know?

    Again I like the chopper look, I just wouldn't want to live with one ;-}
     

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