Bairdco Built For Speed Bike...

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by bairdco, Feb 24, 2013.

  1. GearNut

    GearNut Active Member

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    Now why am I envisioning Frankenstein-esque weld scars all over it?
    Reinforcing webbing or plates at key points, skid plates, crash sliders, ect.
    A sort of Mad Max theme.
     
  2. bajaracer1

    bajaracer1 New Member

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    baird, how do you think the expansion pipe will make the bike feel? will it have a bogged down feeling until it hits the power band and then it will really start to pull? is that how these engine react to expansion pipes?
     
  3. bairdco

    bairdco a guy who makes cool bikes

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    honestly, i don't know.

    the only expansion chambers i've used before are the SBP pipes, and i think they're too small for a heavily modified engine. i could feel the power band coming on at higher rpms, but i never felt any increase in power over some of the other pipes i built, from my insanely loud megaphone to the modified stock pipe with a supertrapp tip.

    the chamber just seemed to lean my bike out to the point of destruction.

    with this bigger pipe, i plan to run "seat of the pants" type tests on it, as well as gps runs to compare it to other pipes i've made.

    i personally don't think an expansion chamber gives the giant boost everyone expects them to, or claims they do. maybe the arrow guys got the right set up, but i never used one..

    i'll let you guys know if it works...
     
  4. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    It's all about port timing and a properly built expansion chamber for a specific engine will bring the engine to life. You can tune them (build them) specifically for top-end (high rpm power) or for low-end (lower rpm torque) if you know what you're doing.
     
  5. 16v4nrbrgr

    16v4nrbrgr New Member

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    Its harmonics like the boost bottle, they're legit but there are some volume calcs.
     
  6. bajaracer1

    bajaracer1 New Member

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    ok well let us know how that pipe feels once you install it.
     
  7. bairdco

    bairdco a guy who makes cool bikes

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    i just call that "welding."
     
  8. glennbo

    glennbo New Member

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    biardco i was reading how you are using alan bolts for the cylinder and head thats a great idea!! i need to replace my cheapo 6mm studs, could you please tell me how long the bolts are that you used! also that enpansion chamber looks pretty cool.
    thanks glennbo
    .wee.
     
  9. bajaracer1

    bajaracer1 New Member

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  10. bairdco

    bairdco a guy who makes cool bikes

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    glennbo, i'm using a different head that's a lot thicker than stock, so the bolts i have wouldn't fit yours.

    i got them at McFadden-Dale industrial hardware. i get all my hardware there for pennies. it costs about a buck to replace all the stock hardware on a china motor with allen heads.

    they give you a 25% discount if you buy boxes of 100, so for about 5 bucks you can have enough bolts for 50 bikes.

    i don't even remember the exact size. i just used a spoke to measure how long i needed, marked it, and brought it with me to get bolts.
     
  11. moonerdizzle

    moonerdizzle New Member

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    That head looks perfect on that motor, and im liking the modified clutch arm.
     
  12. dmb

    dmb Active Member

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    baird the cylinder is on backwards whats the deal??
     
  13. 2door

    2door Moderator
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    Shhhhhh. Baird is a little dyslexic but we don't talk about that around him. He's sensitive about it :)

    Tom
     
  14. buba

    buba Member

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    baird looks good

    i hope you found a ride for the beach cruise tomorrow-- march 3rd
    washington blvd.at the beach parking lot 10 am gather ride out 10:30 should be over
    40 bikers showing up to ride fast and slow

    ride safe
     
  15. culvercityclassic

    culvercityclassic Well-Known Member

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    I will meet you buba at the shack.... See ya... And tell to bring some fast bikes lol
     
  16. bairdco

    bairdco a guy who makes cool bikes

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    here's the progress i made before my crash...

    tank's done and sealed with Caswell epoxy sealer, just needs a petcock.

    engine and 28t sprocket are mounted, and the "finish" is coming along nicely.

    not gonna get any work done on it for a coupla weeks till i can move around, but it shouldn't take long to get it all hooked up.
     

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  17. headtrama

    headtrama New Member

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    Come on Baird, you can't mention a crash without telling the story. The bike looks cool to by the way.
     
  18. unknownbmxa88

    unknownbmxa88 New Member

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    theres a chemical process you can use to instantly rust it. its a combination of muratic acid and hrydrogen peroxide. you can get a life time supply for like 15$ at a hardware store...

    look it up on google. i got some from a friend thats was premixed..

    i think you want like 5% acid and let it sit for like 30 seconds then hit it with the peroxide. and repeat, then flat matte over the top

    its what i used to patina bikes i built.

    http://motorbicycling.com/showthread.php?p=468090
     
  19. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Are you gonna race that Speed Bike bro? Just had to ask knowing that you'll prolly say no. Bikes gotta cool look, got the look of a Ram with the reverse brake levers.

    dnut
     
  20. bairdco

    bairdco a guy who makes cool bikes

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    it's not set up for the track. it's gonna be a street racer.

    with the bars, it has more of a cruiser feel to it instead of a low track racer.

    mostly, i just want a road warrior look... :)
     

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