how to make a cheap layback seatpost.

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by bairdco, Nov 24, 2009.

  1. bairdco

    bairdco a guy who makes cool bikes

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    step one:

    cut up some old handlebars.

    step two:

    there is no "step two."

    see pictures...
     

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  2. Tcams

    Tcams New Member

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    Im going to try that. Thanks Bairdco
     
  3. BarelyAWake

    BarelyAWake New Member

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    ZOMFG - You bastid - you cut up vintage handlebars!?!?

    :p

    *goes back to butchering his own project*
     
  4. toker_ace

    toker_ace Member

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    to thin of tubing. be careful! You'll be strattaling a moving wheel. Ouch!!
     
  5. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    I concur!!! :eek:
     
  6. bairdco

    bairdco a guy who makes cool bikes

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    most seatposts are the same thickness as handlebars. i first started doing this in the late 70's with aluminum bmx bars. we were the only kids with cool anodized laid back seat posts.

    the first production bmx laybacks were pretty much the same exact thing.

    i've done this to just about all my bikes, and never bent or broke one.

    granted, i'm only 135lbs, but as long as you don't extend it more than a couple inches, and don't jump stuff sitting down, it should work fine.

    and yeah, BA, i cut up some vintage handlebars. there's more rust than chrome, and those "scout" bars are still available for cheap.
     
  7. Zenoptic

    Zenoptic New Member

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    Very cool. What about us big guys (300lb)?
    :-||
     
  8. sojudave

    sojudave New Member

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    I have two spare seat posts. I was going to several notches with a grinder, bend them over like an accordian tack weld the cuts and cover in JB Weld. The reason for JB Weld is to see what this stuff can do. If it works consistently then I plan to film a series of youtubes using the stuff.
     
  9. Maxvision

    Maxvision New Member

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    Step two: Fill the hollow tube with mortar or pour stone or something similar. Otherwise the nice 30 degree bend will soon become a 45 degree, then 90 degree then you'll be polishing your ass on the top of the tire.
     
  10. bairdco

    bairdco a guy who makes cool bikes

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    maybe i should change the title of this thread to;

    "how to make a cheap layback seatpost that apparently only works great for me and no one else should ever try it because even though i've never bent one, you might, so go get one welded somewhere..."
     
  11. Norman

    Norman LORD VADER Moderator
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    JB weld ? on the seat post? all that JB weld is,is just a metal filled epoxy it will glue and fill but it will take the place of welding the seat post?answer to that NOPE! You Will be polishing your hinney on the rear tire!!! Smell bacon frying anyone???
    You could get a better result by using a fiber glass cloth with epoxy. the glass cloth will give it some strength. I wouldn't do the cloth glass thing though unless I made it all out of glass and cloth solid core of glass and cloth it would be the same as a glass landing gear used on airplane, but for a few seconds with a welder you'd be farther head welding it.
    Bairdco
    I like your seat post idea using what you have laying around. I don't know what the other guys weigh or do on their bikes one did said he weighs 300 lbs. Your seat isn't taking all the weight of you as your feet are on the pedals. when I'm riding I put most of my weight on the pedals. Especially if I see a bump coming.
    Would you all freak out when I cut up a handle bar for an exhaust pipe header?laff
    Oh old lawn mower handle bars make good header pipes.
     
    #11 Norman, Dec 2, 2009
    Last edited: Dec 2, 2009
  12. 2door

    2door Moderator
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    Thanks, Bairdco.
    You gave me a laugh and made my day.
    Tom
     
  13. bairdco

    bairdco a guy who makes cool bikes

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    no problem, tom.

    for you other guys, get an extra pair of handlebars, put all your weight on them, and see if you can bend them. if you can, congratulations.

    now, look at the handlebars on your bike. OH MY GOD! they have bends in them! the same kind of bends that bairdco's seatpost has!

    i guess you better get some solid steel handlebars, or else i wouldn't put any weight on them...

    hey, aren't you some of the same guys who drill holes in a load bearing frame tube to mount a chain tensioner? ;)

    besides all this foolishness, if you make my seatpost really long, yes, it'll probably bend. especially if you keep all your weight on the seat and do curb drops, or driveway lump jumps.

    if it extends back 3 or 4 inches like mine does, and you use your body to absorb the bumps (like you should,) then you shouldn't have any problems.

    and you have a nice, curved stylish, basically free seatpost.

    and if you weigh 500 pounds, maybe a motorized bicycle isn't the thing for you.

    (disclaimer: bairdco industries assumes no responsibility for busted butts, split tails, asphalt enemas, spoke pokes, hub rubs, rim roids, or cracked cracks. use at your own risk.)
     
    #13 bairdco, Dec 3, 2009
    Last edited: Dec 4, 2009
  14. azbill

    azbill Active Member

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    this made me laugh and spew coffee !!! laff
    I needed that ,,,thanks :)
    (the laugh, not the clean-up ;))

    I have bent handle bars though, when the brake arm clip slipped off my front drum hub (broken lever too, and those bars have been turned into one of azviinie's chopper exhausts :))
     
  15. bairdco

    bairdco a guy who makes cool bikes

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    ..."Give me a place to stand, and I will move the Earth -Archimedes..."

    one of my favorite quotes.

    and yeah, stuff bends. even if you get one of those welded flat plate seat posts, it could still bend. it's all about leverage and force applied (see quote above...)

    i made this thread as a cheap, easy way to make a cool seatpost, that will function fine under normal riding conditions.

    if it's not for you, so be it. but unless you've tried it and it bent and carved you a new one, then save your judgments. i have one on a 50 pound beach cruiser that i've been riding for 15 years, and shows no sign of bending. i've pedaled that bike everywhere, rode off hundreds of curbs sitting on the seat, carrying a twelve pack in one hand. there's a great testimonial right there...
     
  16. Zenoptic

    Zenoptic New Member

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    shoot, I like the idea. Will try in the future.
     
  17. Dan

    Dan Staff
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    2 Funny Baird.

    I am defiantly gonna try this. After ridding one time with a bent seat post, I just don't enjoy motorized bicycle riding with out them. (thanks again Tom!) They make a world of difference.

    Just think of the rider who is 5 foot 13" tall and depending on their MB as thier only wheels and making minimum wage. Bet they are loving this idea. I wonder if simply filling it with sand would shore it up for plus sized riders.
     
  18. bairdco

    bairdco a guy who makes cool bikes

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    thanks, dan. you're the one that told me to make this thread in the first place. now look at the mess you started...;)
     
  19. silverbear

    silverbear The Boy Who Never Grew Up

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    "No good deed goes unpunished."
    SB
     
  20. Dan

    Dan Staff
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    LOL, did you see Animal House? "Face it you messed up, you trusted us" Kidding, kidding, put the bent seat post down!

    I do think it is a great idea and will be trying it. Not sure it would be good for larger ridders but I weigh between 150 and 175 depending on time of year and doubt any future problems.

    I have a Kulana that can only be ridden comfortably with a motor by folks around 4 foot nothing and I switch my 2Door brand bent seat post around on my bikes. Have about 7 sets of old handle bars around so when I get a spare couple of hrs, am going to make one and will post pics.

    Laural & Hardy ....
     

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