DIY Bike and Trike Plans



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  1. Re: online rake / trail calculator & customizing planner

    In theory I could have bundled the axle & tree offset into one number - most such programs do. Al the rest that you enter are hard to avoid.

    There's more output numbers than strictly needed for...
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    Re: funny front end

    That is surprisingly light, but I think if compared with something with similar sized wheels and frame design but conventional seating, the difference would be minimal, and likely in favor of the...
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    Re: Chopper Rake and Trail ?

    Generally at the low end of that, I would say. Some of the best (motorcycle) choppers have almost no trail. Bicycles may be different, since they are going slower, have less rolling resistance...
  4. online rake / trail calculator & customizing planner

    I made this tool for motorcycles, but it is easily flexible enough to work for bicycles and even wheelchairs, trikes, etc. It allows you to enter known dimensions (rake, fork offset, wheelbase, tire...
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    Re: funny front end

    2/3 the weight? How do you figure? The frame is longer than the original by a significant amount, there's no way it could also be lighter while being strong and stiff enough for safety and good...
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    Re: Hossack ('Doulever') motorcycle conversion

    Had it all apart for a while so I could do some more machining to lighten the fork bridge and ball joint taper reciever. Got the lower shock mount done, bolted it back up, and started fitting the...
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    Re: Hossack ('Doulever') motorcycle conversion

    Yah, that's the plan. I was just spitballing with drive by wire - no way I would trust that on a motorcycle, especially one with an early 1980's electric system (which I doubt could provide the...
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    Re: Hossack ('Doulever') motorcycle conversion

    Other than added slop, I'm not sure what the steering link offers over a direct drag link, since the secondary pivot isn't doing anything to keep the steering action in line with the suspension...
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    Re: recumbent SWINCAR

    Leaning is very much controlled by speed, in the simplest manner possible; the section the passenger sits in swings freely without any restriction / control at all. Its like being in a hammock...
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    Re: Hossack ('Doulever') motorcycle conversion

    Exactly the sort of out of box thinking I was looking for! But, hard to execute. Setting up gear systems is outside my experience, and potentially rather expensive. I did look at some types of...
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    Re: Hossack ('Doulever') motorcycle conversion

    I'm not sure I understand... you mean so a small bar movement causes a large fork movement? The point being so that the drag links themselves don't hit anything? I suppose I can do that, although...
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    Re: Interesting wheel experiement

    I'm not really that surprised it worked (in fact, I was more worried about the axle than the spoked wheel). Wheel has less than 750 lbs on it, is symetric, has lots of spokes and a stout rim. I'd...
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    Re: Turnbuckle spoke wheel

    Heh, that's one of the cooler things I've seen in wheel building. Very 'return to first principles' design. I agree with some early posts that getting rid of the bent hooks would be good for wheel...
  14. Thread: Engine Block

    by sebwiers
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    Re: Engine Block

    I think the guys at http://opensourceecology.org/ already considered a lot of the things you are wanting to cover in that video, but aim for heavier duty construction intended for use by...
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    Re: Hossack ('Doulever') motorcycle conversion

    Yeah, range ot motion in the hiems is one challenge with that design. I'm hoping I can position mine so the bolt is vertical (parallel with steering) rather than perpendicular to steering as that...
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    Re: recumbent SWINCAR

    Yeah, it would almost certainly need to be registered if you wanted to take it on road. The question is, as what? If you register it as a car, you need a VIN, which you can't get without...
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    Re: Ball joint for rear suspension arms

    I faced a similar dilemma when picking pats for the Hossack front motorcycle I'm building. I went to an auto parts store and a friendly employee leafed through the catalog with me until we found a...
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    Re: PERFECT kingpin angles

    Looks to me like this is an improvised tube notcher. You can buy a tube notcher that mounts to your drill press for less than $200. A cheap one doesn't allow acute angles and might not be quite as...
  19. Re: Any dual interest bicycle/motorcycle riders out there.

    Started a thread here for my own questions re the build -
    http://forum.atomiczombie.com/showthread.php/9730-Hossack-(-Doulever-)-motorcycle-conversion

    Build thread on motorcycle forum, lots of...
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    Re: recumbent SWINCAR

    I think most places. If needed for road use, you would have to register it as a 'low speed vehicle', because its not gonna be able to go on the highway. My aunt owns a golf cart as her only...
  21. Re: Any dual interest bicycle/motorcycle riders out there.

    The bars (and stem) will be custom, yup. Only bike bits would be the headset and head tube (mainly because machining a head tube is a PITA). In theory I could use a BMX stem and conventional...
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    Re: Hossack ('Doulever') motorcycle conversion

    Correct, original handlebar location, with reducer cups to fit a 1.125" bicycle headset.



    Yes, as shown in the video, the wheel moves more or less vertically. One challenge this imposes is...
  23. Re: Any dual interest bicycle/motorcycle riders out there.

    The headset doesn't take those forces, any more than the steering column in your car has to absorb brake forces. If you look at the gifs, you can see the whole system moving up and down and...
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    Hossack ('Doulever') motorcycle conversion

    Picked up a working motorcycle with no title for $100, bought a non working motorcycle of same type with title for $200. Went nuts customizing. Why? If I have to explain that here...

    On a...
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    Re: recumbent SWINCAR

    The motors are in the hubs, as with a lot of electric bikes.

    The designer actually did a version with a centrally located motor, have no idea how it transfers power to the wheels. Actually...
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