someone sell me a engine that runs or gimme shelter

Discussion in 'Motorized Bicycle General Discussion' started by bulljo, May 17, 2013.

  1. bulljo

    bulljo New Member

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    So after my crank bearings blew i took apart my engine and waited patiently for the money to rebuild it. During this time i ported and matched to crankcase. Then i decided to buy another motor from zingmulu in the meantime that didnt even run, i tinkered with it for weeks till i gave up then decided to go along with my rebuild i replaced bearings,seals.rings,crank,piston,bolts and gaskets. Got it on my bike today everything hooked up and sealed. Got spark, gas ( brake cleaner ) , and the wheel drags.
    now when i bump it ,it makes a pathetic sound,i figured theres not enough compression or i put the wrong piston with cylinder but the ports open like they should . While doing this i stripped oneof my head bolts. Please offer advice because i need transportation,my only parent travels every weekand im too poor for anythings else.drn2

    But im never gonna give up


    Thanks,
    JOE
     
  2. crassius

    crassius Well-Known Member

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    no offense intended, but some folks just don't seem suited for working on these

    I recommend you find someone in your area that will work with you on this project. Perhaps another set of eyes will spot where you're going wrong.
     
  3. maniac57

    maniac57 Old, Fat, and still faster than you

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    If zminglu sold you a bad motor, POLITELY state your issue and he should work with you.
    Screaming rants do nothing to help your case and will cause the vendor to ignore you.
    Being polite works wonders.
    I've dealt with this vendor and had good results getting replacement parts.
     
  4. bulljo

    bulljo New Member

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    Haha i can see how i would look like a noob, but i assure you i have decent experience rebuilding engines. Ive rebuild 2strokes , four and six cylinders four strokes, ive bought engines from zingmulu that didnt run at first but i tinkered with them and got them to run. I never ranted at him it just this one engine was a horrible cast and stripped every which place so i forgot about it. I would ask my ase master tech dad but hes in england. Im gonna get the headbolt fixed and try again. Im just stumped because i covered all the basic stuff besides whati stated above
     
  5. bulljo

    bulljo New Member

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    So the bottom line is... if i have compression, the carb is good and i have decent spark with no leaks in the case or intake.what else could i give a go.
     
  6. BigBlue

    BigBlue New Member

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  7. maniac57

    maniac57 Old, Fat, and still faster than you

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    Fuel seems most likely. Just cause it's getting fuel to the CARB does not mean it's getting to the ENGINE.
    I'd check for clogs or defects in the jets and passages.
    Possibly timing? Is the key in the mag rotor still good?
    Spark in the wrong place will not work yet pass the easy checks.
    If none of those pan out, hit it with a big hammer till it runs.
     
  8. Trey

    Trey $50 Cruiser

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    Official Gas-Bike last step of any repair how to list. :D
     
  9. fatdaddy

    fatdaddy New Member

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  10. crassius

    crassius Well-Known Member

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    somehow, the phrases "i ported and matched to crankcase" & "now it doesn't start" are often seen together

    the phrase "or i put the wrong piston with cylinder" indicates that it is time to pull it apart and carefully measure old parts with new to see if they are really the same

    there are several of these engines that look very similar, but won't work with parts mixed
     
  11. bairdco

    bairdco a guy who makes cool bikes

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    joe, where in orange county are you? assuming you mean orange county, CA, and not florida, i might be able to help if you can get the bike over to me in Midway City.
     
  12. bulljo

    bulljo New Member

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    Alright so im getting a good spark, the plug is wet when i pull it, compression is alright. I have the grey looking zl crank in right now. Im thinking its the wrong piston but i put the opposite piston and it runs into the crank. No exhaust or intake or head leaks. The engine is assembled exactly right seals and all. I didnt really port it just a clean up. Is it possible for the timing to be off? Should i try flipping the magneto?
     
  13. bulljo

    bulljo New Member

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    Youthink you can help me bairdco? What if we have to pull apart the engine and assemble it together?
     
  14. bulljo

    bulljo New Member

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    Lol! I flipped the magnet and it fired right up! Completely rebuild ht66! Thanks for the suggestions guys.
    Let it be know throughout the kingdom that the magnet goes only one way
     

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