Push trailer from a minibike

Discussion in 'Push Trailers' started by EsQueue, Jun 19, 2009.

  1. EsQueue

    EsQueue Member

    Have anyone made a push trailer from a minibike? Do anyone here have a picture of one?

    I have a welder and have an uncle who can weld pipe well. I'm planning on purchasing a cheap one from losangeles.craigslist.org and butcher it up into a push trailer.

  2. Mountainman

    Mountainman Active Member

    not a bad idea

    but -- seems there will be excess tubing that's not really needed

    probably will not have the cool look -- I could be wrong

  3. EsQueue

    EsQueue Member

    I'm surprised to not see your signature. "Ride that ugly minibike THING".

    Oh yeah, it would look horrible if I were to leave it fully intact.

    I would have to do some major butchering.and will be cutting most of the bike but leaving only the drive-train. I would of corse add the needed reinforcement after that. I would aslo make a license plate mount as I've sent off for one already :D

    The reason for this would be to to save costs as a minibike can be had for way less than all the bearings and drive components of a push kart
  4. stude13

    stude13 Active Member

    put motormaker in the search. he built a nice unit with the motor alongside of the rear wheel and full pictures. i ran with it and built one by using one bolt.
  5. macarollo

    macarollo Guest

    That is a nice idea... then you can put a passenger on the mini bike!

    There is also a good rear brake on those mini bikes.
  6. I built this minimal push trailer nearly 20 years ago. This short video is all that remains of it except the hitch.


    Use pause when watching the video to see it a little better.

    It worked just fine. No need for it to be any stronger or heavier. It seems a shame to pay for, then throw away most of a minibike frame when it's so simple just to use a few bolted pieces of angle steel (mine was from a discarded bed frame) to attach the engine to the wheel. Nothing had to be welded. It only has to be substantial enough to support the weight of the engine, not a passenger.
    The 'u-joint' hitch does not have to be as precisely built or as strong if the trailer stands vertically on its own by the pendulum weight of the engine. That's why mine seems a little longer than necessary. I needed to lengthen it a little to get more of the weight under a line from the seatpost hitch to the contact patch of the tire. (SEE ATTACHMENT)
    The extra length also placed the engine in the middle between the hitch and contact patch such that the small flex of the 3/4 inch electrical conduit tongue stopped the trailer from bouncing as much.
    There is no need for more tire pressure than is necessary to keep the bead seated. The stiff sidewall keeps the tire in shape and the low pressure helps the trailer absorb bumps in the road. The low weight and low pressure nearly eliminates the possibility of punctures or even tread wear. I can't understand why anyone would prefer a foam airless tire. It's been reported here that they wear quickly.
    I can understand cannibalizing a minibike if it can be obtained cheaper than the sum of its components, but it seems to me that you should keep the frame intact so you can sell it to recoup some of your outlay.

    Attached Files:

    Last edited by a moderator: Jun 21, 2009
  7. EsQueue

    EsQueue Member

    I understand but I've seen minibikes running which sells for around $100. The components come up to more than that easily. I'm even thinking about something in the picture for $150. I just hate to scrap it but cali laws make it impossible to do anything with it. What I plan on doing is disconnecting the drive-train from the rest of the frame. The whole engine, mounting plate, and all drive components can come out as one piece as it moves with the suspension.
    Last edited: Jun 27, 2009
  8. push, pusher trailer from minibike frame

    I see what you mean. You could reposition the shocks to require less leverage for them to operate. Mount the tops and/or bottoms of the shocks closer to the swingarm pivot. If necessary move the bottoms of the shocks nearer the fender mount holes (or tabs welded on just for the shocks) and reattach the tops farther forward.
    Another way would be to reattach the bottoms of the shocks considerably closer to the swingarm pivot.
    You could calculate the new shock positions based on the difference between total weight on the rear wheel with and without a rider. Any angle changes (from the current 90 degrees between shocks and swingarm) would affect leverage as well. If possible make these calculations and arrange for the shock positions to be adjustable for fine tuning.
    Disguise it with a cover that doesn't restrict airflow and make or adapt a larger more effective muffler for it. No one will suspect you have a motor vehicle.
  9. EsQueue

    EsQueue Member

    Now you are speaking my language buddy. Those were my "EXACT" plans. LOL.
  10. EsQueue

    EsQueue Member

    I will go a different route. I have purchased this beast and but haven't picked it up yet. Looks way too dangerous to ride. It even have a rear foot brake even though I don't know how it is operated.

    I will cut out the front and weld something to convert this into a push trailer. I plan on relocating the gas tank to give the engine a smaller appearance. I will add the needed fuel pump. I also plan on mounting a storage container on the mid section.


    Attached Files:

  11. Just_Gasit

    Just_Gasit Member

    WOW, that scooter rig is really interesting! I wouldn't ride it either! I can see it will make a real nice push trailer though. You could keep all that shinny diamond plate and nobody will know what the heck it is!
  12. EsQueue

    EsQueue Member

    You wouldn't believe how big that thing is. Keep in mind that the engine is a FULL SIZE honda or clone 5.5hp engine. Look at how small it appears. That rear tire is 6" wide. Of corse I tried not to but I had to ride it and it is dangerous. While giving it full throttle it tries to trow you off. Turning is a pain also.
  13. ZnsaneRyder

    ZnsaneRyder Member

    YEA! HP sure is fun isn't it!

    Well, good news for you, it will be much safer as a bicycle trailer instead.
  14. EsQueue

    EsQueue Member

    I was having a little fun on google sketch. Here is what I plan.

  15. EsQueue

    EsQueue Member

  16. RMWdave

    RMWdave Member

    im thinking im gonna cut up a pocketbike for this
  17. BikeMan

    BikeMan Member

    There is the infamous Dragnfly.Its a mini bike frame pusher.The place in CA that used to make em doesnt do it anymore,not sure what happened.Anyway using a minibike frame pusher has at least one positive aspect.That is you can carry cargo on the top level of the frame.

    Back in 2002 they took several Dragnfly's and ran a charity event that started in Mexico and went all the way to Canada.They had many pics of the trip on their website.It was amazing.I don't think their site is up any longer.

    If I remember correctly the one thing that's important for balance of the mini bike frame pusher(if using the larger engines-weight) is on most of these frames you either need to widen it some or run a jackshaft set-up.Reason is when you place the engine on the mounting plate holes,it's not often balanced causing the pusher to pull your bike to one side.Not all frames but still a great many.The widening of the frame is so you have room enough to run your chain without hitting or even going past your frame,after moving your engine for balance.Widen or jackshaft.

    Attached Files:

  18. linnix13

    linnix13 Member

    wow i like your front wheel drive moped! that things cool! looks like a pain to ride though,
  19. FWD motorized bike handling

    "a pain to ride"?......not in the least. As soon as you start rolling, the mass of the engine becomes unnoticeable. It handles real well and you can easily pedal off the line and use your rear coaster brake to help the front drum. The only problem was that FWD vibration made a handlebar mirror useless and led to faster burnout of bicycle headlight filaments.