Sacrificing pocketbike for push trailer.

Discussion in 'Motorized Bicycle General Discussion' started by Humsuckler, Aug 3, 2009.

  1. Humsuckler

    Humsuckler New Member

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    Well as the title says, im going to sacrifice my souped up pocketbike for a pusher.
    I just dont really know how I should go about the project, so im looking for some interested people to come up with ideas.

    I am looking for a top speed of about 60kmh with a crusing speed of 45-50 kmh.

    I want to keep this trailer fairly compact. Basically, the only "trailing" part should be the engine, jackshaft and rear wheel not extending any more than 2 feet from the back of the bike.

    I dont know jack about gearing ratios.

    The easy route would be to gear down the back wheel's sprocket to the smallest reasonable. Ill pedal the trailer up to 20kmh before engaging the throttle.

    Sounding like a good idea already eh?

    I will post up some pics tomorrow and mabye take some stuff apart.
     
  2. Humsuckler

    Humsuckler New Member

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    tonight i frigged around with some galvanized angle steel and the grinder and wasnt very happy with what i built. but i did get the idea in my head about cutting up the pocketbike frame! i took off the upper part where the seat pan would mount up and cut the forward frame members about halfway. ill need to have a bit of welding done next. ill post up a pic or two tomorrow morning!

    im thinking if i put a larger pinion gear in the clutch housing and a smaller rear sprocket it will make a great little 40kmh assist trailer. mabye even hit 50+
     
  3. Cabinfever1977

    Cabinfever1977 New Member

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    Sounds cool, cant wait to see pics.
     
  4. Just_Gassit

    Just_Gassit New Member

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    You mean like this? This was a scooter (just a 36cc) I used the motor, wheel and gas tank. Everything else I made. Goes 18 MPH. Easy, compact and quiet. I move on to a HT in the frame on the same bike after the first week of riding it though! I do miss the simplicity and lack of vibration.
     

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  5. Humsuckler

    Humsuckler New Member

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    gasit you got it! pretty close. im going to put up a pic tomorrow of what i have to work with.

    its pretty modified lol
     
  6. linnix13

    linnix13 New Member

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    nice! i did the same think awhile back with the 33cc, it was good but pretty slow

    im currently building one using the 49cc version of that engine instead of the 33, how fast do you think the 49 will be?
    100_3045.JPG
     
  7. meerkatt

    meerkatt New Member

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    What mods have you done to your PB motor? What rpm & speed were you getting on it & what gearing were you using? I have seen cag (i am assuming its a cag?) gears around at 8/54 which gives a massive top speed. Are you using a reduction box? Are you sick of my questions? Oh yeah, driving wheel diameter?
     

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