I completed my first motobike frame!

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by Joaquin Suave, May 28, 2011.

  1. Joaquin Suave

    Joaquin Suave New Member

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    Fuel management by Campagnolo, LOL!

    [​IMG]
     
  2. Mike B

    Mike B New Member

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    That is smooth!
     
  3. Joaquin Suave

    Joaquin Suave New Member

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    I'm happy to say that tomorrow is test ride day!

    I'm confident of my clutch and transmission because they were run extensively on the test bench...but there is nothing like testing on pavement!

    The only items to complete the bike is there new front wheel and disk brake, air cleaner, grips and paint....YEAH HOO!!!!!

    46 pounds of pure love!
     

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  4. worksmanFL

    worksmanFL New Member

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    Joaquin,

    Niice Ride!

    Can you tell me/ us some more about your rear wheelset?

    Thank you.

    :)
     
    #24 worksmanFL, Jun 9, 2011
    Last edited: Jun 9, 2011
  5. Joaquin Suave

    Joaquin Suave New Member

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    The hub is a Sturney Archer 8 speed with a disc mount.
     
  6. Joaquin Suave

    Joaquin Suave New Member

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    I am happy to say that i have test ridden my prototype bike and can now honestly say...Its the real deal (even though there are a few minor issues to resolve).

    I have not wanted to go into detail about the workings of it until I "proofed my concept". Here is some (not all) of the key design components...

    *9.5:1 Primary transmission
    *2:1 Secondary drive (thus sprocket smaller than rear brake disc)
    *Hydraulic clutch
    *Modification of Honda GXH 50 so that it would fit between crank arms that have a tread (Q Factor for you bike dweebs) that is only 20mm wider than a normal Mt. bike!
     
    #26 Joaquin Suave, Jun 12, 2011
    Last edited: Jun 13, 2011
  7. Goat Herder

    Goat Herder Gutter Rider

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    I like how your bike came out! Very clean concept. The bike looks awesome and very little clutter to boot. This is one of my favorites. I like the tank a lot it keeps the top bar free and clear.(^)dnut
     
  8. Stoney

    Stoney New Member

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    Very nice...
     
  9. Erich_870

    Erich_870 New Member

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    Sounds awesome!

    I'm confused by this last modification. What changes did you make to your GXH50?

    Erich
     
  10. Joaquin Suave

    Joaquin Suave New Member

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    Thanks for the compliments guys!

    I better clarified my last post so that it made more sense.

    The biggest modification was simply removing the pull start mechanism. I also did some trimming of the flywheel. I will also be trimming the output shaft after I am 200% convinced that my transmission is "bought off".

    The bike is designed to be a pedal assisted motor scooter as opposed to motor assisted bicycle.
     
  11. MotorBicycleRacing

    MotorBicycleRacing Active Member

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    You didn't put anything about 4 stroke in the title so I missed reading this...lol

    That is too cool, I love it. Best 50cc 4 stroke thumper ever!
    How do you start it?
     
    #31 MotorBicycleRacing, Jun 14, 2011
    Last edited: Jul 4, 2011
  12. Joaquin Suave

    Joaquin Suave New Member

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    Start pedaling and pop the clutch.
     
  13. worksmanFL

    worksmanFL New Member

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    Hi Joaquin,

    Can you shoot more pics all over, and maybe make a video so I/ we can admire your work?

    :)
     
  14. Lance Portnoff

    Lance Portnoff New Member

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    looking good suave
     
  15. Joaquin Suave

    Joaquin Suave New Member

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    Here you go. I am currently consumed in clients projects (thank you lord!), so the moto-bike has to be back burner'd for a few weeks. My next step is to build another transmission with a sightly different gear ratio, a tweek or two to the clutch (friction coefficient material algorithms don't take into account low RPM "shock" starting of motors), a soft fuel cell, braze-ons for cable mounting, and mounts for a rear rack....

    Then I'm going to cut the frame in half!

    Design Logic wrote:
    Thanks for the complement! Especially given that you are offering such a forward thinking product yourself.

    [​IMG]

    [​IMG]
     
    #35 Joaquin Suave, Jun 28, 2011
    Last edited: Jun 28, 2011
  16. Dan

    Dan Staff
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    Beautiful! And you got a 4 smoke in-frame with out the "silly walk" wide pedals. Hats off to ya!

    Could you share more about your clutch? Certainly understand if ya don't wanna divulge.

    Had so many attempts fail , about gave up, lol


    Great work
     
  17. MotoMagz

    MotoMagz Active Member

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    Nice job....some of you guys are very talented.
     
  18. Joaquin Suave

    Joaquin Suave New Member

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    Dan wrote:
    Sorry no, for at least right now. I will tell you that I've got close to 2 years into the research & development of the clutch and transmission and it has not been an "easy" road. My first iteration was a conical clutch with a micro-V belt (with spoke mounted Sheave) and I "bailed" on the concept because I could only start the motor by hand turning the rear wheel (on the test buck) 6 out of 10 times. My current iteration started the motor 10 out of 10 times X 5 tests!!!! But here is the crux, I am going after a specific "client" that will be uber perticular about performance and rectum (damb near killed him) up tight about the technology they buy into...

    So for right now I feel that is best that I not chirp.

    Heck, if all goes well i'll be marketing motor-bike components to the public as well.
     
  19. Dan

    Dan Staff
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    Cool Mon.

    There is defo a market.
     
  20. dmb

    dmb Active Member

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    i agree! their's an old ww2 saying loose lip's sink ship's. don't loose your product by letting someone pirate your idea's then make it themself's. its happened before and maybe its going on now. now i guess i'll dissapear...again
     

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