Something I Haven't Done To An MB

Discussion in 'DIY Home Built Motorized Bicycle (non kit)' started by cannonball2, Jan 12, 2019.

  1. cannonball2

    cannonball2 Well-Known Member

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    Guess I have built just about all kinds of MBs but never a push trailer. Figured I would give it a shot.

    The trailer is made from scrap left from our old house renovation. Uses a wheel barrow wheel with a 72t #35 sprocket welded to it. 212 Preddy thru a TAV 2 clone. The TAV is the only way to go these days @ only $52 shipped why fool with a cent clutch. Ratio is a 4.8:1 which starts off at a 12.8:1 and ends up at a 4.32 if it reaches OD. Figures to the low 40s with the governor, the Preddy is governed at 3800 instead of the usual 3600 With out I bet 50+ is easily possible. Really just want a relaxed cruise in the upper 30s.

    The thing is not as ungainly as it looks in function, is very quiet and is as vibration-less as an ebike. Has worked very well is the short time I have used it. Cool thing is my wife got a steal on a nearly new Schwinn Meridian and it will quickly hook up to it. Will hook up to various bikes we have. I made a two sided seat post to adapt the bigger posts. Its got skid rails on the sides to protect the engine should the need ever arise-- hopefully not!
     

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    #1 cannonball2, Jan 12, 2019
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  2. cannonball2

    cannonball2 Well-Known Member

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    Plan to rebuild the bike with three spoke mags and disc brakes front and rear as it needs better stopping power at the speeds and weight it experiences.
     

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    #2 cannonball2, Jan 12, 2019
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  3. cannonball2

    cannonball2 Well-Known Member

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    Went on an extended test run. Its so much fun just kept riding. This thing is pretty fast! Acceleration is quick and the top end is pretty high. Didn't have a way to measure it but it's up there. Handling is excellent turns around easily in the road, and they are fairly narrow down here. Leans easily with the bike in turns.

    Really the only thing that makes you know it's back there is over bad bumps there is a slight jacking of the bike fore and aft. And the power!
    Think I'm really going to use this as practical transportation. Will easily keep up with traffic in our town. Heck I passed a few cars! Gonna be pretty cool on the trike but will have to set the throttle limit screw to keep the wife out of trouble!

    If you are not building an MB for looks or replica etc. this is not a bad way to go especially since it quickly transfers from bike to bike of similar size.
     
  4. MacZulu

    MacZulu Member

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    That's pretty cool, I would have never thought of that
     
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  5. cannonball2

    cannonball2 Well-Known Member

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    I didn't think of it either but thanks. These have been around for years. There are even electric versions. This is probably about as big an engine as is practical, I have seen some smaller versions using 49cc engines that work well and are much lighter.
    The Preddys are so cheap ($99 on sale)and reliable that I couldn't see using any thing else. Plus there is no replacement for displacement!
     
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  6. cannonball2

    cannonball2 Well-Known Member

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    This thing has been totally reliable and stupid fast! Swapped it over to a carbon framed full suspension bike. Much nicer ride. The 79cc Preddy would be a good choice also. Only down side I can find is it takes up a bit of space in the garage. Other than that its a heck of a good ride!
     
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  7. allen standley

    allen standley Active Member

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    Very nice work Cannonball.
     
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  8. cannonball2

    cannonball2 Well-Known Member

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    Thanks Allen
    Its one of those things that works better than it looks. The ability to swap it to most bikes or even trikes is kinda nice.
     
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  9. curtisfox

    curtisfox Well-Known Member

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    Can twe say cannonball, has done it all now. LOL Nice work, I like it...........Curt
     
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  10. dogcatcher

    dogcatcher Active Member

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    You need to build a replica of a small boat as a cover for it, make it look like you are pulling a small boat, when on reality it is pushing you. Make it look kind of like one of those sidecar looking boats. Or maybe a small travel trailer, like you are pulling a small tear drop travel trailer.
     
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  11. Greg58

    Greg58 Well-Known Member

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    download.jpeg I like the travel trailer idea, make sure to do a two tone paint job like all the new retro campers.
     
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  12. cannonball2

    cannonball2 Well-Known Member

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    Curt I wish I could say this is it but I just got an old tandem and happen as always to have an extra engine. I probably need to check in to a rehab facility that helps the mechanically insane. Just can't seem to stop putting stuff together.
     
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  13. cannonball2

    cannonball2 Well-Known Member

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    Here's its latest configuration
    It would be cool to do something to disguise it. Maybe put one of those kids bike trailers body on it and put a stuffed dog inside. There was a guy on YouTube that built one with a real nice aluminium teardrop body. Looked great. IMG_20190424_071532.jpg
     
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  14. indian22

    indian22 Well-Known Member

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    That thing is just too cool & practical as well. I also relate to building to much stuff just because and I freely admit to being psychologically disordered as well.

    Rick C.
     
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  15. Greg58

    Greg58 Well-Known Member

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    Is the rise adjustable for different size bikes? This has me thinking of something for my wife, maybe a trike with a 79cc geared to do about 20mph. We do a lot of camping at state and gov. Parks, would be fun to ride there.
     
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  16. Tyler6357

    Tyler6357 Well-Known Member

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    Very nicely done!!
     
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  17. curtisfox

    curtisfox Well-Known Member

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    Went to look at a retirement place with my sister in law, thought they were nice. But didn’t see any room for my welder and tools,LOL. Like you just got to be changing building something, setting here in my motor home, make a list of things going to make better, or redo. .........Curt
     
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  18. fasteddy

    fasteddy Well-Known Member

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    Curt, I hope you have lot's of paper. It's a never ending job.

    Steve.
     
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  19. curtisfox

    curtisfox Well-Known Member

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    Worked in a paper mill for 35 years, LOL. Be fun to get ahold of some of them engineers and teach them a little common sense. ......Curt
     
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  20. TyrantTaren

    TyrantTaren New Member

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    This!! THIS!!!! I so need to mimic this, it might be exactly what I need... but we shall see. It might be a second build, or a modification of my current one a thousand miles down the road (which, at one point, sounded like a lot... But it's really not.)
     

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