Cant figure it out! Please help!

Discussion in '2-Stroke Engines' started by macabroswb, Apr 14, 2011.

  1. macabroswb

    macabroswb New Member

    Hey guys,
    So i think I fouled a plug, as i was experiencing lag and couldnt get it to even start at one point. I cleaned the plug, put it back in and the bike started up just fine. However, the idle quickly raced completely out of control, prompting me to shut it down. Its not my idle adjustment... Also, when I went to restart it, it wouldnt. PLease help
     

  2. GearNut

    GearNut Active Member

    I am assuming that you are referring to an HT engine. You did not state what type of engine you are having troubles with.
    It sounds like you are experiencing a serious air leak somewhere in the intake.
    Check where the carburetor attaches to the manifold as well as where the manifold attaches to the cylinder.
    It is also possible to have a leaking crankshaft seal, but check the intake gaskets first. They commonly leak as the factory gasket material is horrible.
    The last thing to come to mind is a leaking head gasket. If it is in fact leaking you can see the telltale black oil around where it is leaking right where the cylinder head mates with the top of the cylinder. Do not confuse this with any oil that may be blown back from a leaking exhaust gasket though.
     
  3. macabroswb

    macabroswb New Member

    Would a leak in the intake cause it to over rev without being throttled?
     
  4. GearNut

    GearNut Active Member

    Absolutely!
     
  5. macabroswb

    macabroswb New Member

    Ok, will check. Thanks
     
  6. macabroswb

    macabroswb New Member

    And I dont think I have a Ht motor... I got this bike complete ... Its from a company called incalcu-bike, which I believe doesnt exsist anymore
     
  7. GearNut

    GearNut Active Member

    Got pictures?
    None the less, the problem you are describing sounds like an intake leak.

    This sounds silly, but if it has a carburetor with a float bowl, running out of gas will cause very similar symptoms.
     
  8. macabroswb

    macabroswb New Member

    I dont have pictures right now. Ha, no I didnt run it dry, I may not know everything, but I hope i know at least that much. haha.
     
  9. srdavo

    srdavo Active Member

  10. macabroswb

    macabroswb New Member

    No, its not one of those models, although it seems to be from that company. To Gear nut: Thanks for the advice. My intake gasket was totally gone. What do you think about using liquid gasket to repair?
     
  11. GearNut

    GearNut Active Member

    Stay the heck away from liquid gasket as a stand alone sealant.
    You can use it as a gasket dressing, applied very sparingly on both sides of the gasket, but you will need a good quality gasket none the less.

    If you cannot find a ready made gasket easily, purchase some quality gasket material from an auto parts store. Be sure that it will stand up to exposure to gasoline and high temperatures. Ask the parts counter folks if you are unsure.

    Apply a thin coating of liquid gasket to either the carburetor or the heat block/ manifold and while it is still liquid, press it down onto the gasket material as if it were a rubber stamp. Let it dry some on the gasket material but wipe off the gasket sealer from whatever engine part you applied it to.
    Now you have an exact imprint of the gasket that you need.
    Using an Exacto knife or razor blade, very carefully cut out the "printed" shape from the gasket material. Sometimes it is necessary to trace over the cut lines in multiple passes rather than trying to cut all the way through the gasket material in one pass.
    When done, insure that there are no dangling bits on the edges around where the air flow or fuel flow may come in contact with the gasket. I sometimes burn them off with a lighter or file them smooth with a jeweler's file.
    A trick to punching holes in the gasket material for the bolt holes, ect. is to use a bullet casing or even a paper hole punch if the hole size is correct. I have even used bits of random steel, copper or brass tubing that I sharpened one end of.
     
  12. macabroswb

    macabroswb New Member

    Hey guys. just a follow up on my issue. So, after doing everything I could think of, (and repairing that intake leak) I realized my whole problem was just two simple things:
    1) My killswitch was broken, and would ground constantly
    2) my choke swirch was loose and vibrating itself to the off posistion anytime I rode

    Thanks for everybodies advice, and remember to check the LITTLE things
     
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