Dual Sport Trailer assembly thread

Discussion in 'Some Assembly Required' started by The Cheat, Jan 13, 2006.

  1. EvanADV

    EvanADV Big Bearded Boy

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    :freaky
  2. oldNbold

    oldNbold Been here awhile

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    As said above these are just my thoughts and I also don't want to offend anyone. There is no need to fear a well done welded joint. A properly done weld is just as strong as the base metal. Many times welds done incorrectly will cause failure of the base metal usually in the heat affected zone. Many times these projects are taken on by part time fabricators with limited skills and equipment. Don't take me wrong there are some very good part time welder/fabricators working out of their garage.
    I inspect and test welds for a living and am a certified welder.
  3. r80rt

    r80rt Dirt road nomad

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    My buddy OldBrattrider and I are building a trailer for my TW200. The shock and wheel will be from an old Honda scooter on our swingarm, the frame and cargo area are built from 3/4" heavy wall square tubing. I've looked at tons of trailers on line and used idea'a from several of them. We made hitch points from the rear axle using a set of modified wheel spacers. Here is a look at what we've got so far. More pictures as we progress.
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  4. Old White Truck

    Old White Truck Been here awhile

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    That looks substantial!

    Also looks like a good shop you have there.
  5. r80rt

    r80rt Dirt road nomad

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    Thanks! That shop belongs to OldBrattrider, he has the coolest toys in the world and know's how to use them. I'm just holding the dumb end of the tape and grinding welds, he's doing the real work. I can't wait to get it done, we'll do a you tube video of the maiden voyage with it attached to my TDub.
  6. marguyo

    marguyo Adventurer

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    thanks! reel thank you ! i change my coupling this winter
  7. r80rt

    r80rt Dirt road nomad

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    We got back to the TW200 trailer project today, the swing arm is built and mounted to the trailer, still waiting on a new tire. I hope to have the tongue and hitch arms built tomorrow, with any luck I'll pull it home Saturday.
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  8. Salsa

    Salsa Been here awhile

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    What is the theory behind the 10 degrees or why SHOULD it be better?

    Don
  9. Not the Messiah

    Not the Messiah Not the Messiah

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    Salsa,

    HTML:
    What is the theory behind the 10 degrees or why SHOULD it be better?
    
    In a turn, with the bike (and trailer) leaned over AND the trailer at an angle to the bike (ie "trailing" into the corner) the front triangle of the hitch must move upward slightly to let this all happen. It's all about the geometry of the pivots. Anyway, tilting the pivot forward exagerates this upward movement of the hitch. I'm guessing a bit now, but I suspect that this stops the trailer "dropping" or "falling" into the corner and dragging the bike into more lean - by holding the trailer up it let's the bike feel more neutral.

    I hope this makes sense. I tried to sketch it out but my tech drawing skills have left me...
  10. r80rt

    r80rt Dirt road nomad

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    Today's progress on the TDub trailer. Here is the swing arm and shock finished. The shock from the front of the scooter was to soft so we used the one from the rear, it's much better.
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    A nearly done hitch made from 1 1/2 strap steel, the off set in the swing arm caused us a bit of extra head scratching, but we got it.
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    A test fit of the hitch. Anything that moves has a bushing and a grease zerk, I like things to be smooth. I got my new trailer tire in the mail today finally!. It may be a few days before we can finish it, but there ain't a lot left to do.
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    It's a little hard to see in this picture but the hitch pin leans forward 10 degrees, it's supposed to make them track better, I hope it does cause it was a pain in the neck to get right.

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  11. r80rt

    r80rt Dirt road nomad

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    Almost done:clap
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  12. Curtis in Texas

    Curtis in Texas Been here awhile

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    Looks good! Have you calculated the lean angle in turns your going to be able to do before the front corner of the trailer strikes the ground?

    Making a leaning turn into a driveway up a curb will tell if you've got enough clearance. If not, you'll figure it out real quick once you pick yourself off the ground.

    I like the scooter wheel idea. I"m trying to figure out how to make one work on mine so I can add a brake on the trailer into the mix.
  13. Lizrdbrth

    Lizrdbrth Wackjob

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    Very secksee.
  14. steveWFL

    steveWFL Long timer

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    nice~
  15. r80rt

    r80rt Dirt road nomad

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    Well if we've done everything right, I should have plenty of clearence, I'll find out today. If there are any problems I'll cut the front corners off at a 45 degree angle.
  16. oPAULo

    oPAULo jack of all terrain

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    Sitting here on a picnic table enjoying the sunrise while Dirt Flirt reads a book. First time camping off the bikes is awesome! Trailer performed very well. Got the shocks all sorted out with some oil for damping and internal springs. Still get a slight swaying above 55mph but we're sticking to back roads and gravel on this trip anyway. I think I'm getting some flex near the steering head and already have plans how to stiffen it up.

    Packed a good size tent, air mattress, blankets, cold beverages with ice in the insulated scooter bags, tools, food, and some other crap.


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  17. r80rt

    r80rt Dirt road nomad

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    Very cool!
  18. r80rt

    r80rt Dirt road nomad

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    Exclusive spy shot of the fat boy's first test ride of the trailer, it still needs to be disassembled and painted but it pulls like a dream and handles great, I'm big happy to say OldBrattrider has built me one hell of a trailer. I'll post finished shots as soon as the paint dries.
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  19. r80rt

    r80rt Dirt road nomad

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  20. mwilliamshs

    mwilliamshs Been here awhile

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    what are those saddlebags?