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  1. Thread: 82 CB750 Build

    by jordan
    Replies
    35
    Views
    2,498

    Nah he just wants to “looked at it sitting there...

    Nah he just wants to
    “looked at it sitting there in my girlfriend's grandmother's parking garage;”

    Handling is secondary.
  2. On the flipside when is the last time bimota made...

    On the flipside when is the last time bimota made an engine?
  3. All engines in that category are going to be...

    All engines in that category are going to be triumphs.
    I believe to be announced last year triumph would be supplying it’s triple engine for Moto 2
    ...
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    https://m.ebay.ca/itm/202287876545?_mwBanner=1&ul_...

    https://m.ebay.ca/itm/202287876545?_mwBanner=1&ul_ref=http%253A%252F%252Frover.ebay.com%252Frover%252F0%252F0%252F0%253Fmpre%253Dhttps%25253A%25252F%25252Fwww.ebay.ca%25252Fulk%25252Fitm%25252F2022878...
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    That’s because a lot of the “why do i need x...

    That’s because a lot of the “why do i need x amount?” Depends on the rest of the motorcycle.

    The weight on the front wheel
    The stiffness of the frame
    The width of the front tire
    Etc etc
    ...
  6. Replies
    4,217
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    409,519

    So much want... Sent from my iPhone using...

    So much want...


    Sent from my iPhone using Tapatalk
  7. 1. Put a tach on, could be an air leak. What...

    1. Put a tach on, could be an air leak. What happens if you turn the choke on while this is happening?

    2. Sounds like the clutch is dragging.
    How is the clutch freeplay?
    When was the oil last...
  8. Replies
    381
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    87,986

    Budget Parts-Bin Bultaco

    Assuming the angles in your diagram are the same as the frame, that should be just fine like that.

    How much travel are you trying to get out of it?
  9. Replies
    381
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    87,986

    https://uploads.tapatalk-cdn.com/20180321/a42a6590...

    https://uploads.tapatalk-cdn.com/20180321/a42a65900745ff6793dfb359d50f7f0a.jpg

    This is what XB was getting at, but illustrated.

    You have a range of angles to lay the shocks at so that you have...
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    242,958

    Making fun of CL ads makes me feel better

    Honestly, anything over 5-6k makes no sense to me unless it’s mindblowingly well done, and almost everything is one off.
    For half the price...
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    Mine does 50$ per hole, bore+hone+ chamfer if...

    Mine does 50$ per hole, bore+hone+ chamfer if it’s a 2 stroke.
  12. Replies
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    409,519

    Some assembly required....

    Some assembly required.
    https://uploads.tapatalk-cdn.com/20180316/8ae9c2357402f088f44e249449f01b4d.jpg

    ...
  13. Replies
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    242,958

    What a bargain, discounted to only 6500$ from the...

    What a bargain, discounted to only 6500$ from the 16k$ asking price last summer...

    https://uploads.tapatalk-cdn.com/20180316/446e41dd5d9e97db6807a07366c0b47e.jpg
    ...
  14. Replies
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    This idea i could get behind. Two shots of egli...

    This idea i could get behind.
    Two shots of egli TZ frames, and a Rau cantilever frame. Rau took over from Egli when he called it quits.
    ...
  15. Replies
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    Foale Frame designs

    Ran the analysis again with a 65mm*1.8mm spine, which yielded 14, 16, 85 % increases to the torsional, lateral, and longitudinal distortions respectfully. The total weight for the frame and sub frame...
  16. Replies
    45
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    2,007

    What we really need is Robin Tuluie

    What we really need is Robin Tuluie
  17. Replies
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    Actually, i majored in physics, with a minor in...

    Actually, i majored in physics, with a minor in math and programming...
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    Exactly I would love to see a rear suspension...

    Exactly
    I would love to see a rear suspension setup that doesn’t impart a force downwards on the front wheel.
    The best way to picture it is to replace the shock with a solid strut and ask yourself...
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    “on a more verticasl shock ther load is downward...

    “on a more verticasl shock ther load is downward at pivot”
    Yes, and depending on the geometry, a 2:1 leverage ratio of wheel to shock travel means the pivot sees the same (but opposite) force as the...
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    Look at the angle of that shock though It runs...

    Look at the angle of that shock though
    It runs parallel to the imaginary line between the neck and pivot.
  21. Replies
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    I must be missing something. Do you agree that...

    I must be missing something.

    Do you agree that when the frame a load such that the rear tire is under 450lbs of load, if the SA is a cantilever with a 2:1 length ratio, the rear shock is under...
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    In the original frame designs the front mounts...

    In the original frame designs the front mounts were just bolted to the spine.

    It will do little to reduce the torsional strain as they are mounted so close to the axis of rotation in comparison to...
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    I had assumed as much, which is why they were not...

    I had assumed as much, which is why they were not included in the simulations.
  24. Replies
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    Foale Frame designs

    That may be true, but you know as well i that every action has an equal and opposite reaction. You can angle the rear shock appropriately so that the upper shock mount and SA pivot are facing equal...
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    Likewise i loaded 750lbs on the front axle and...

    Likewise i loaded 750lbs on the front axle and the frame displaced the axle by a whole 42mm
    That means the spin twisted 3.6 degrees
    I think once the engine is bolted in, it will help strengthen...
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