Lite Trail Bike

Discussion in 'Some Assembly Required' started by rmcconnell33, Dec 5, 2013.

  1. rmcconnell33

    rmcconnell33 Adventurer

    Joined:
    Sep 7, 2008
    Oddometer:
    22
    Location:
    The PNW
    I have been thinking about building a super lite trail bike for a long time, something kind of like the FX bikes, I have had a lot of idea's, so I finally decided to try it out, I have finished the first prototype. And I am totally pleased.. And now I have started in the second one making a few improvements concerning components.

    The base was to use a Honda CRF50 and add down hill mountain bike components, couldn't find a reasonable priced CRF to cut up, so for the first try I used a Chinese 125cc pit bike. I stretched the frame, added Marzocchi down hill forks and a 26" front wheel, and then had to fabricate a swing arm.[​IMG]

    After several trail and error attempts I cam up with a design that would work for a test.[​IMG]

    I had to lower and move the foot pegs back, and tried several different gearing combinations, before I got it were it was a blast to ride. once finished I had to put new plastics on it.. I am calling it the trail lite.
    [​IMG]
    Final weight is 93 lbs wet. It's very nimble and feels super light:evil
    Some of the items I am changing on build number two, is better forks [​IMG]
    and a real rear rim.. The Mountain Bike stuff is super lite, but it wasn't designed to have power applied to it either! I have bent the spokes twice..lol but while I am gathering parts for the next and final build, I am still riding this one.[​IMG] I will post more pictures of the final build.:D
    #1
  2. BC61

    BC61 Long timer

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    Sep 10, 2005
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    Charlotte, NC
    Pictures aren't showing, did it come out looking anything like this? A friend of mine built this, cross between motorcycle and pedal bike.

    [​IMG]
    #2
  3. GI_JO_NATHAN

    GI_JO_NATHAN Long timer

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    Middle GA .....Aparently....
    Very cool!
    #3
  4. bk brkr baker

    bk brkr baker Long timer

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    [​IMG]

    Motoped
    #4
  5. orangebear

    orangebear Long timer

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    dumfrie scotland
    The pushbike wheels look to thin and weak. I would run proper wheels and fork so nothing will brake at speed .
    #5
  6. Salsa

    Salsa Been here awhile

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    Dec 12, 2006
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    Arizona, Alaska, Kalifornia
    Looks like 48 spoke wheels to me. Plenty strong.

    I have gone 65 on similiar on a 160cc similiar machine.

    Don
    #6
  7. rmcconnell33

    rmcconnell33 Adventurer

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    Thanks, the wheels "rear wheel" seems strong enough, but I have bent the spokes at the hub! They weren't designed to have any torque on them. Lol. I am switching to an excel rim and real spokes.
    #7
  8. Roadracer_Al

    Roadracer_Al louder, louder, louder!

    Joined:
    Aug 5, 2007
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    Location:
    Oakland, CA
    :lurk
    #8
  9. XC Rider

    XC Rider Motorcycle Vagabond

    Joined:
    Dec 19, 2008
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    Location:
    Right where I need to be
    Woh, Crazy! Talk about super light weight bike!

    I LOVE IT! :clap

    Can't wait to see you're Gen2 version.
    #9
  10. tdvt

    tdvt Been here awhile

    Joined:
    Jul 19, 2012
    Oddometer:
    219
    Location:
    NEK Vermont
    Very cool bike!

    All three pics look like close kin, design-wise. Is the pit bike frame steel or aluminum?

    Any more construction pics? I was also wondering about wheelbase & seat height? Looks like huge ground clearance.

    Subscribed & thanks for sharing.
    #10
  11. OConnor

    OConnor Bad juju

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    May 22, 2004
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    3,857
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    Midwest
    I like the OP's bike with regular pegs, can't imagine pedaling a 100lb. mountain bike up a hill.:eek1
    #11
  12. Luke

    Luke GPoET&P

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    Beaverton, OR
    Really nice build! Any more pictures?


    Looking forward to the next one. :lurk
    #12
  13. rmcconnell33

    rmcconnell33 Adventurer

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    I do, I am traveling for work currently when I get home this weekend I'll post some more.
    #13
  14. snowhawk jockey

    snowhawk jockey Slack Jaw Gaper

    Joined:
    Jul 5, 2005
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    Location:
    The other Center of the Universe: Bend, Oregon
    In much of Europe, if there are pedals, it is a different class of motorbike and can be ridden by youths. No pedals, no youth license. Here in the states it is the opposite, No Pedals or No Sale! Nobody pedals these "mopeds" around...:deal

    There was a pitbike maker that imported a 21" front and 19" rear 125 with tall frame, back a few years ago. Same concept, just add pitbike parts instead of MTB parts. I'll post a pic when I find one...
    #14
  15. rmcconnell33

    rmcconnell33 Adventurer

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    Sep 7, 2008
    Oddometer:
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    The PNW
    Here are a couple more Pic's

    [​IMG]
    [​IMG]
    and some fun in the snow..[​IMG]:evil
    #15
  16. biggsxr

    biggsxr Adventurer

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    Columbia, MO
    Any updates??

    Sent from my SPH-L710 using Tapatalk
    #16
  17. rmcconnell33

    rmcconnell33 Adventurer

    Joined:
    Sep 7, 2008
    Oddometer:
    22
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    The PNW
    With the holidays and cold weather / and no heat in the shop, I haven't done much worth posting. But I am moving forward. Pic's soon.
    #17
  18. biggsxr

    biggsxr Adventurer

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    Jun 9, 2011
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    Columbia, MO
    Yes! Updates Please!
    #18