well i messed up big time

Discussion in 'Motorized Bicycle General Discussion' started by dropleg, Sep 19, 2011.

  1. dropleg

    dropleg New Member

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    what would i need? would new piston rings be needed? This bike doesn't have many miles on it. Also could i take it to a shop and get the muffler welded on?
     
    #21 dropleg, Sep 24, 2011
    Last edited: Sep 24, 2011
  2. decoherence

    decoherence New Member

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    you can use a cut soda can to use as a sleeve to hold the rings when slipping into the jug.

    don't weld the exhaust on.
    just drill & tap to bigger screws.
     
  3. dropleg

    dropleg New Member

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    why is welding not recommended?
     
  4. crawler

    crawler New Member

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    You can't weld aluminum to steel. A timesert kit might save you.
     
  5. Mozenrath

    Mozenrath New Member

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    Also, the aluminum is cheap pot aluminum and won't weld very easily.

    Drill and re-tap. There's gotta be someone in your town who will do it for you.
     
  6. dropleg

    dropleg New Member

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    I just ordered a new jug. ok so im finding out that using hex screws on my exhaust might have been the reason they were stripped.I replaced them with hex screws when the studs kept falling off. so Allen cap screws are the answer??????? i need to know, im about to get some. It doesn't seem that hard to slip the piston into the jug. I have done it with my old jug and i managed to get in on without tools just by holding the piston rings by hand, orienting them with the slits in the piston, kinda hard to explain. moves up and down and piston rings are fine. am I doing this wrong?

    let me make this clear, i just practiced slipping the jug on the piston. i dont have the new jug yet.
     
    #26 dropleg, Sep 27, 2011
    Last edited: Sep 27, 2011
  7. decoherence

    decoherence New Member

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    the screws heads are fine.
    they stripped out on many of us.
    including me.
     
  8. FarRider

    FarRider New Member

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    Aint that annoying?
    I use heli coil inserts and allen head cap screws, hasn't failed me yet.
    I like the beer can ring compressor trick, very cool...
    RIDE FREE!
    FR
     

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  9. dropleg

    dropleg New Member

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    well now i have an other problem, the engine jugg i have doesnt line up with my intake. now what?
     
  10. dropleg

    dropleg New Member

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    ok, its not my fault. the Chinese didn't tap it correctly. i have a plant to fix it without drilling
     
  11. dropleg

    dropleg New Member

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    ok well, i guess im the dumb one. i need a new intake, the gasket it came with fits, looks like im getting a smaller intake. these bikes dont make sense
     
  12. FarRider

    FarRider New Member

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    Ah, yes.... welcome to the wonderful world of the HT china girl engines.
    Just a quick question...Is the intake port in the cylinder the same shape as the one in the intake manifold?
    If so your ok, if not you got some port matching to do.
    Once the ports line up correctly, you can re drill and tap the manifold and intake while they are still off the engine cases.
    Remember, a gross miss match in the intake port will cause turbulence in the intake track, turbulence will cause the fuel/air mixture to fall apart (droplet fallout) this is a bad thing on a 2 stroke, think of it as de carburizeing the fuel.
    This will cause it to 4 stroke or not run at all.
    I use a hunk of modeling clay laid over the port, then I press the manifold in its correct position, then i pull it apart and very carefully take out the hunk of clay and examine it, this tells me were and how much metal to grind out. Be conservative here, do not remove to much metal!
    Match the port and intake manifold to the intake gasket if you cant do the clay trick, but that requires you to position the manifold FIRST!
    Good luck.
    FR
     
  13. dropleg

    dropleg New Member

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    well i found out the new jug is a 30mm not a 40mm. it fits the cylinder fine, for all i know its fine. its definitively a 80cc. now i just ordered a 30mm intake. should fit fine. is there some sort of vita mistake im making. I don't want to find out that 30mm stud spaced intake jugs arent compatibly with my engine which had a 40mm stud spacing originally.
     
  14. dropleg

    dropleg New Member

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    this bike is taking me so long to get working. i guess im learning the hard way
     
  15. CTripps

    CTripps Active Member

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    Welcome to the club, brother... sometimes the learning curve requires a bit of climbing gear, but it's worth the effort.
     

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