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Thread: Born to be Mild - Gas powered mountain bike

  1. #1
    Join Date
    Aug 2007
    Location
    Reno NV
    Posts
    13,357

    Born to be Mild - Gas powered mountain bike

    So, Just thought since there was some interest, I'd post this project as I mosey along on it.

    The Fedex man dropped the package off about 3 hours ago and heres where I am so far...

    First off, decided I needed a bike repair stand, so grabbed a couple of pieces of iron pipe I had laying around, a 90 degree fitting, and an unused pipe clamp fitting. Took some lumber cut it to 6", cut a wedge out of it, drilled some holes in the wood and put it all together. Clamp the vertical pipe in my workbench and voila! A bike repair stand!

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    So here's what comes in the kit. Basically an engine, tank, carb, sprocket, carb, and controls!
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    Step 1: Attach the Engine
    Well, I couldn't attach the engine down really low where the mounting brackets would have worked perfectly, because the front gear shift was in the way, and the pedals were hitting the engine, so I had to move it up the seat post a bit. That meant I had to craft a little mount for the front of the engine. Fortunately, I had some metal left over from a chainlink fence project. This is the part that goes in the end to clamp to the uprights. Bent it over, drilled some holes, used the bottom water bottle mount and bobs yer uncle the engine is mounted!
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    Step 2: Attach the drive sprocket to the left side of the rear wheel. Whoops! Here we have a problem. The radius of the holes in the sprocket is about 1.5mm too small for the hub on my rear wheel. I think I'll just pull out a drill bit, drill the holes a tad bigger in all of the pieces and put it on, but first I need to go inside and take a break for a while. Elapsed time so far, let's give it 2 hours....
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    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  2. #2
    Join Date
    Oct 2006
    Location
    somewhere east of Queen Creek, AZ - South East of Phoenix
    Posts
    8,529
    "There’s a lot of work being done today that doesn’t have any soul in it. The technique may be the utmost perfection, yet it is lifeless. It doesn’t have a soul. I hope my furniture has a soul to it." - Sam Maloof
    The Pessimist complains about the wind; The Optimist expects it to change;The Realist adjusts the sails.~ William Arthur Ward

  3. #3
    Join Date
    Aug 2007
    Location
    Reno NV
    Posts
    13,357
    Oh, Just in case anyone is interested, heres the kit I ordered...

    Grubee 48cc Skyhawk

    I went for the smaller engine because here in Nevada, it doesn't have to be licensed if its under 50cc's... And I don't really need the speed, if you know what I mean. Just looking for a little something to put-put around on...
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  4. #4
    Join Date
    Jun 2008
    Location
    GTA Ontario Canada
    Posts
    12,247
    Go Brent Go
    cheers

  5. #5
    Join Date
    Aug 2007
    Location
    Reno NV
    Posts
    13,357
    Sprocket, Chain, and Tensioner installed. Time to go make dinner.

    Probably took an hour just because my hub was odd sized. Other wise pretty easy...

    Click image for larger version. 

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    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  6. #6
    Join Date
    Aug 2007
    Location
    Reno NV
    Posts
    13,357
    Fully Assembled.

    A couple more hours I guess. Biggest issue I had really is that the muffler had too much bend. The pedals are just too close together on this bik, and I guess they though the muffler should be able to stick pretty much straight down between the left pedal and the frame

    Well, Nothing a blow torch and a little muscle cant fix. The muffler piple looks pretty dodgy, but I'll see if I can't find a better long term solution.

    Tomorrow, I get to put some gas in it and see if it runs!

    Attached Thumbnails Attached Thumbnails b2bm_07_Assembled.jpg  
    Programmer - An organism that turns coffee into software.
    If all your friends are exactly like you, What an un-interesting life it must be.
    "A door is what a dog is perpetually on the wrong side of" Ogden Nash


  7. #7
    Join Date
    Feb 2007
    Location
    Catalunya
    Posts
    4,632
    Well, well, well, I think that this post should be banned from this forum Now we'll see most of the members (including myself) rushing for their old bikes and customize them with those motors.

    You make it look so easy and so good that this will be like virus. I must admit that it caught me. Fortunately enough shipping costs to Spain were as much as the price of the motor so that acted like a vaccine.

    Great job Brent! I look forward to see the final pics, and find out how much fiddling you had to do with the carburator adjustment.
    Best regards,
    Toni

    __________________________________________________ __________________________________________________ _________________
    web site:http://www.toniciuraneta.com
    I also dream of a shop with north light where my hands can be busy, my soul rest and my mind wander...

  8. #8
    Join Date
    Oct 2006
    Location
    ABQ NM
    Posts
    30,008
    OK, I know you're not quite old enough to qualify, but still...

    http://www.youtube.com/watch?v=DYcll0QZboo



    I also like the yellow linen dumbbells in the lower left corner of the pic. I'll bet those are quite the workout.

    Seriously, the bike mod look like a lot of fun.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  9. #9
    Join Date
    Jul 2009
    Location
    Amherst, New Hampshire
    Posts
    10,600
    I predict a few burned legs in your future
    Faith, Hope & Charity

  10. #10
    Join Date
    Mar 2007
    Location
    Escondido, CA
    Posts
    5,167
    That's funny, Vaughn!

    Glad I am older than that!

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