It Ain't the Spark Plug !

Discussion in 'Motorized Bicycle General Discussion' started by Wheel Rush, Sep 28, 2008.

  1. FileStyle

    FileStyle New Member

    Joined:
    May 27, 2008
    Messages:
    724
    Likes Received:
    0
    do you have any garbage in the tank? what kind of wire and plug do you use? do you have lights attached to your motor?
     
  2. misteright1_99

    misteright1_99 New Member

    Joined:
    Mar 21, 2008
    Messages:
    716
    Likes Received:
    0
    I dont use the silicone sealant, I use an oring inside the throat of the carb where when installed it seals the inside of the carb to the end of the intake manifold.

    I sent you a PM with a link as to what I am talking about, any questions let me know..........
     
    #22 misteright1_99, Sep 29, 2008
    Last edited: Sep 29, 2008
  3. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    I'm using the same plug, not really sure what the gap is that it came as, and what it should be set to ? So, I am guess ing it doesn't come already gapped for my 80cc Chinese ?

    I am now down to the plug, the wire, or did something go wrong with the gas mixture, while just sitting there, other than the fact the weather has changed a little and I am at sea level, I am running with the stock carb accelerator setting, that I have not changed, but am willing to.

    I am still getting loss of power not so much bogging down, but the power isn't where it was. It is like it is missing, or not firing exactly right, this occurs only when in motion and accelerating. Kind of a rough ride like you are riding the RR ties, but not actually that drastic.

    Can you give me a gap spec. I should be using ?

    The last tank which was I believe my fourth gallon was 30-1 per Kings,

    I used Valvoline 2 Cy. Multi-purpose.
     
  4. misteright1_99

    misteright1_99 New Member

    Joined:
    Mar 21, 2008
    Messages:
    716
    Likes Received:
    0
    I would try different gaps start at .018 or .020, I found my bike runs best at .030 30:1 sounds good I run 32:1 also check to make sure the plug wire is screwed in tight to the CDI and the plug cap, and inside where it goes onto the plug there is a screwdriver slot, make sure that is tight...
     
  5. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    I guess I will have to root around for a gaping tool or feeler gauge, but in either case, I stuck the old one back in there.
    With all your advice you have me in a generous mood and I hope that I can return the favors to this forum, and I will, but for now I have gone over the material and found your advice very good and also useful, . . . but I have not yet solved the problem, and am beginning to think along the lines of possibly something significant, head gasket or maybe even worse !

    I am getting the Pap< pap, Pap sound and am thinking that it may not be coming out of the end of the muffler, it sounds like it is in the head, cylinder.

    I hate to say this but it even sounds like a knock, so whats in there that would make an unmistakable harsh pap or knock and make the bike ride like its going down the RR on the ties ? :bike2:

    This is beginning to sound like a job for Norman !
     
    #25 Wheel Rush, Sep 30, 2008
    Last edited: Sep 30, 2008
  6. sissonscott

    sissonscott New Member

    Joined:
    Jul 8, 2008
    Messages:
    14
    Likes Received:
    0
    Same symptoms I had on a old honda motorcycle. Turned out to be a mostly plugged exhaust. I bet that is what you are fighting. Idled great, no power and jerky when you gave it the gas:D
     
  7. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    OK, I've got the Kings Chengine Users manual in front of me, and looking at the trouble shooting guide I see the following;

    Regarding spark plug;
    1. Wash spark plug and keep the clearance about 5mm. ????

    2. High Tension line destroyed Change it and get rid of the short circuit.

    Regarding Insuffient;

    Oil Leak in Crank case, . . . Whats that all about ???

    Igniting time improper Adjust igniting time, whats this all about ????

    Anybody !! :ride2:
     
  8. TexasDav

    TexasDav New Member

    Joined:
    Aug 19, 2008
    Messages:
    528
    Likes Received:
    0
    I had a problem that sounded like yours, it was the plug wire. Run good at low speed and bog and jerk when I would give it more gas. also my choke was so lose it bounced shut at times. Don;t know if that is any help but good luck.
     
  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    3

    You can start by completely disregarding whatever rubbish you are reading that states anything like you have quoted.
     
  10. Pablo

    Pablo Master Bike Builder & Forum Sponsor

    Joined:
    Dec 28, 2007
    Messages:
    3,652
    Likes Received:
    0
    5 mm? That's like a foot in metric!!rotfl


    START with a NEW plug. Gap that dog 0.020-0.025 and go from there.

    At this point I also suggest things such as:

    Drain the tank and remove that absolutely stupid in tank screen.
    Make a FRESH batch of premix (go BUY FRESH low octane fuel from a busy station). Get a good oil and mix it 30:1.

    Remove the cylinder head, wipe down the sleeve and head, replace head gasket and retorque.

    Check the needle taper.

    Get a new plug wire.

    Replace the intake gasket.

    etc

    P~
     
  11. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    Sisssonscot,

    I've ripped 6cyl, Chevys' apart and stuck'em back together, but this is actually my first bike engine, So I'm,
    I've never had that problem,. . . what did you do about it ?
     
  12. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    If you take off the muffler, to see if it is fouled, and start it up and forget that the idler screw is all the way in from the trial runs previous, make sure you have a kill switch !!

    The Strieking Banchee turns itself into a Murder-Cycle !
     
    #32 Wheel Rush, Sep 30, 2008
    Last edited: Sep 30, 2008
  13. jerseykat1

    jerseykat1 New Member

    Joined:
    Sep 28, 2008
    Messages:
    134
    Likes Received:
    0
    did you ever solve your problem wheel rush?
     
  14. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    Oh, . . . sorry about that yeah, the muffler, 3-4 mo. in use was the problem., previous thread prior to yours, it was fouled up some how I'm getting another!

    Here is a copy of the previous answer;

    If you take off the muffler, to see if it is fouled, and start it up and forget that the idler screw is all the way in from the trial runs previous, make sure you have a kill switch !!

    The Strieking Banchee turns itself into a Murder-Cycle !
     
  15. jerseykat1

    jerseykat1 New Member

    Joined:
    Sep 28, 2008
    Messages:
    134
    Likes Received:
    0
    having a similar issue.
    was there an obvious blockage in the muffler? could you blow through it with little effort? my muffler has lots of oil and crap in it as well but i can easily blow through it. its a little too late for me to remove the muffler and start her up i will have to try that tomorrow.
     
  16. Motormac

    Motormac New Member

    Joined:
    Sep 23, 2008
    Messages:
    108
    Likes Received:
    0
    Misterright, can you provide me with this link too, I would like to know what size oring will fit the intake. Thanks Mac
     
  17. Wheel Rush

    Wheel Rush New Member

    Joined:
    Jun 21, 2008
    Messages:
    209
    Likes Received:
    0
    Jerseykat1

    Nope! It was clogged to the point you could not blow air through it, but I would very much suspect that the compression could push it's way through.
     
  18. Goat Herder

    Goat Herder Gutter Rider

    Joined:
    Apr 28, 2008
    Messages:
    6,251
    Likes Received:
    2
    :rolleyes:Spark can fail under load I had CDI that drove me crazy for a day. If the CDI is trying to quit it will fail under load. Hope this helps
     
  19. Goat Herder

    Goat Herder Gutter Rider

    Joined:
    Apr 28, 2008
    Messages:
    6,251
    Likes Received:
    2
    In a cylinder when the atmospheric pressure is raised [compresion] misspelled ,the electricity wants its easiest path to ground it always will, its not a smooth path to the other side of that plug if spark is breaking down. Thats why electro is suspost to be insulated maby CDI internales just lost her insulation. Atmospheric pressure raises resistance to the electro, pressure does change the way electro wants to act, the resistance. Hince forth the load.
     
    #39 Goat Herder, Oct 14, 2008
    Last edited: Oct 14, 2008
  20. Goat Herder

    Goat Herder Gutter Rider

    Joined:
    Apr 28, 2008
    Messages:
    6,251
    Likes Received:
    2
    Oh one last thing for rethinking what my prob was ,and for I saw my CDI was warm When I had a fit to swap it. I was sittin on a spare kit at the time
     
    #40 Goat Herder, Oct 14, 2008
    Last edited: Oct 14, 2008

Share This Page