Tips to Stop Handle Bar and Seat Post Rotation?

Discussion in 'The Workshop' started by Rides4Fun, Dec 4, 2017.

  1. #1 Posted Dec 4, 2017

    Finally riding a big boys bike

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    Hi fellow Cabers,

    I have a ‘39 Westfield boy’s bike and the original seat post and handle bar was rechromed many years ago. Even though I tighten them pretty well, I am having trouble getting them snug enough to keep the post and bar from rotating when in use.

    The knurling on the handle bar, for example, doesn’t seem to offer a lot of traction since the rechroming may have muted it some. I don’t want to over-tighten the stem (beautiful Torrington Gooseneck) or seat post again (broke the bolt before) and was wondering if anyone has any good tips to offer on ways to slightly “fatten up” the bars and post for a better hold? It looks like 1/32 if an inch in extra diameter would fix things.

    I apologize if this has been discussed before. I have been searching through the website, but can’t seem to find anything.

    Thank you very much,

    Barry
     
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  2. #2 Posted Dec 4, 2017

    Wore out three sets of tires already!

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    Hey Barry, Shims can be made out of anything. 1/32" equals about 0.030 of an inch. If you're not into measuring, a matchbook is about 1/64". If you were to wrap it once around the bars, then that would add to each side giving 1/32". You can find a piece of metal like a beer can and do multiple wraps. Or, a tin can is thicker. At the hardware store are things like thin-walled brass plumbing bits, sheet aluminum, whatever. A hack saw, tin snips, or scissors are all you need, depending on the thickness of the material. Start with the beer can. It cuts easily and won't scratch the chrome.
     
    #2 TR6SC, Dec 4, 2017
    Last edited: Dec 4, 2017
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  3. #3 Posted Dec 4, 2017

    Finally riding a big boys bike

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    Thank you for your suggestions! I’ll try the beer can approach first......looks like it’s going to be a fun night as I plan to stop by the store and get enough material to make several shims since it will be my first attempt:)
     
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  4. #4 Posted Dec 5, 2017

    Cruisin' on my Bluebird

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    I tried the beer can shim without a lot of success, the bars would slip on the soft, slippery thin metal of the aluminum can. If you aren't using a commercial shim product you will want something that creates friction to hold the bars in place. The LBS tried to help me with the and eventually he simply replaced the gooseneck stem with a plastic BMX type thing and changed the head tube hardware out...I hate that kludge and will replace it when I replace the bars (a big water meter hole where some fool stole the cover in the road knocked the cross brace out anyway).
     
  5. #5 Posted Dec 7, 2017

    Finally riding a big boys bike

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    in the harley shop we use emery paper, the kind on a roll. rip off a couple inches, rip to trim to size, place as a shim. holds real well for pushing several hundred pound motorcycles by the handlebars!
     
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