Help there's a hole in my engine

Discussion in '2 Stroke Bicycle Engines & Kits' started by ninjaplatypus42, Aug 30, 2016.

  1. ninjaplatypus42

    Joined:
    Mar 16, 2016
    Messages:
    118
    Likes Received:
    0
    [​IMG] Pretty simple, there's a small hole in my engine. I attached a picture. If you can't see it it's parallel with the nut that holds the carb on. Can this be fixed? Could i solder it closed? Or would it have to be a weld? Quick answers would be greatly appreciated i ride my bike to class and ill need it tomorrow. Thanks.
     
    #1 ninjaplatypus42, Aug 30, 2016
    Last edited: Aug 30, 2016
  2. Kioshk

    Kioshk Active Member

    Joined:
    Oct 21, 2012
    Messages:
    1,152
    Likes Received:
    7
    Ignore it...it's an innocuous casting-error. It has ZERO affect on functionality.
     
  3. ninjaplatypus42

    Joined:
    Mar 16, 2016
    Messages:
    118
    Likes Received:
    0
    It is not a casting error it just happened. Having a hole in the side of the engine absolutely has an effect on functionality. It sounds horrible and has little power.
     
  4. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Joined:
    Jul 28, 2010
    Messages:
    5,845
    Likes Received:
    103
    If you take the intake off can you see the hole on the inside?

    Poke a piece of wire through the hole.

    99.9999% it is just a common casting flaw that does not go
    all the way to your intake port so it will have no effect.

    Probably didn't just happen but you just noticed it......
     
  5. crassius

    crassius Well-Known Member

    Joined:
    Sep 30, 2012
    Messages:
    4,032
    Likes Received:
    153
    can't see it, so don't know - but I do know that nothing can be parallel to an object at a point, so probably why I can't find it
     
  6. ninjaplatypus42

    Joined:
    Mar 16, 2016
    Messages:
    118
    Likes Received:
    0
    It does go all the way through. It now makes a very loud flapping noise like the head gasket isnt tightened down all the way (which it is, i checked). It just happened, i can feel air on my leg from the hole. It isn't a casting error else it would have always made this noise and blown air out the hole, which it hasn't.
     
  7. Kioshk

    Kioshk Active Member

    Joined:
    Oct 21, 2012
    Messages:
    1,152
    Likes Received:
    7
    Haven't had to say this since I was about 11, but "No DUHHHH!". Your picture shows a prime-candidate for casting-residue flaking. Also, you neglected to include important information like your engine sounding horrible and having little power.

    Take a better picture and take some time to provide a better description of your problem.
     
  8. ninjaplatypus42

    Joined:
    Mar 16, 2016
    Messages:
    118
    Likes Received:
    0
    Kioshk you are the one that said to ignore a hole in the engine lol. I felt I had to state the obvious since you seemed to have ignored it. My question was not whether I had a hole or not, it was how to fix a hole. Sounding horrible and having little power has nothing to do with fixing the hole, so I didn't mention it until you questioned whether the hole was a problem. I assumed that everyone would agree that it was but i was obviously wrong. I apologize for the poor picture quality; I don't have a camera.
     
  9. Kioshk

    Kioshk Active Member

    Joined:
    Oct 21, 2012
    Messages:
    1,152
    Likes Received:
    7
    SMH

    Good luck!
     
  10. curtisfox

    curtisfox Well-Known Member

    Joined:
    Dec 29, 2008
    Messages:
    4,891
    Likes Received:
    1,113
    There is no quick fix other then JB weld................Curt
     
  11. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Joined:
    Jul 28, 2010
    Messages:
    5,845
    Likes Received:
    103
    If your head gasket is blown out tightening the head will do nothing.
    Take the head off to check the gasket.

    A hole as shown in your pic would have to be 3/8" deep to go all
    the way into your intake port although it looks to line up with the
    stud hole.

    I would think that a hole in the intake would suck and not blow?

    Show me a pic of a piece of wire going from the outside and into
    your intake port.
     
    #10 MotorBicycleRacing, Aug 30, 2016
    Last edited: Aug 30, 2016
  12. Chaz

    Chaz Well-Known Member

    Joined:
    Jun 3, 2012
    Messages:
    1,004
    Likes Received:
    66
    Yes, jb weld should be an easy fix. It can withstand a constant temp of 500 degrees F. and up to 600 short term.

    If you don't have any handy, you could bung in some fishing weight lead. 620 degrees F melting point
     

Share This Page