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  1. #16
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    Jun 2003
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    Quote Originally Posted by Gingermick View Post
    Serviced only a few weeks back,
    Don't know anything about motorbikes but I had the same problem with a Ford Fairmont Ghia adapted to run on gas. Great on a cold start, but restarting within 20 mins of turning engine of was impossible.

    Neither the RACV nor a ford dealer could find the fault, but talking to a home mechanic one day whilst walking in the street he suggested to increase the size of the cables from the battery to the starter motor and earth. Did this and never had any problems again.

    So it may be in your cables and may be worth looking into if all else fails.

    Peter.

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  3. #17
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    Feb 2005
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    Mackay Qld
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    Yes, I spoke the people who sold me the bike and they said that it sounds more like an electrical problem. Increased heat in the electrics ups the resistance in the cables so spark may not get through. I'll have to check that out
    cheers peter
    Mick

    avantguardian

  4. #18
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    Feb 2005
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    Mackay Qld
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    Quote Originally Posted by Ashore View Post
    just not that 2 stroke rubbish
    It uses less fuel than my previous bike ,a 4 stroke, 110cc honda.
    Mick

    avantguardian

  5. #19
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    May 2005
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    Quote Originally Posted by Gingermick View Post
    Increased heat in the electrics ups the resistance in the cables so spark may not get through.
    also why you need the correct spark plug, btw is yours the 87 or the 88 model ?
    Ashore




    The trouble with life is there's no background music.

  6. #20
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    Oct 2007
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    Alexandra Vic
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    Quote Originally Posted by Gingermick View Post
    It uses less fuel than my previous bike ,a 4 stroke, 110cc honda.
    Course it does, you're pushing it or looking at it, not riding it.

  7. #21
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    Feb 2005
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    Mackay Qld
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    Quote Originally Posted by Ashore View Post
    also why you need the correct spark plug, btw is yours the 87 or the 88 model ?
    86

    Quote Originally Posted by malb View Post
    Course it does, you're pushing it or looking at it, not riding it.
    Well you see I had to ride the postie bike pretty much full throttle all the time (it had trouble on the 100kph zone) and it used a lot of fuel that way.
    Mick

    avantguardian

  8. #22
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    May 2005
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    Newcastle
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    Anything pre 88 the DENSO Hot U standard plugs are the way to go though its still 2 stroke rubbish
    Ashore




    The trouble with life is there's no background music.

  9. #23
    Join Date
    Apr 2008
    Location
    Perth
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    289

    Default Ginger

    Have you checked the coil. Back in the early seventies I had one of those TY250 Yammie Trials bike, while out the back of Mt Coota with a bunch of mates annoying the country folk with our bikes we stopped for a rest. I went to start the bike but it would not fire. pulled everything out there and then. Motor cold it fired up. Took a couple of days before finding out the coil had failed.

    D D

  10. #24
    Join Date
    Oct 2002
    Location
    Brisbane, QLD, Australia
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    46
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    2,115

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    Had similar issues with my 2-stroke outboard motor. Wouldn't start when hot. It could have been a few things but likely that the spark plug gap was too wide causing a poor spark that seemed exacerbated when the motor was warm... perhaps the gap widened ever so slightly when hot? Check the spark plug gaps are what they should be for your motor. Sometimes the plugs suggested for your motor don't have the correct gap out of the box and require re-gapping before putting them in and using them.

    I ended up changing the ignition coils too This might also have been the cause so check that.

    Also check fuel is getting to the motor. My outboard used a vacuum type fuel pump and after warming up then stopping and letting it sit for 5 mins it would lose its vacuum and require re-choking and several yanks on the start cord to get fuel flowing again.

    So might be any of those too if they relate to your bike motor?
    How much wood could the woodchuck chuck if the woodchuck could chuck wood?

  11. #25
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    Jul 2003
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    On the Downs, Darling SEQld
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    Quote Originally Posted by Ashore View Post
    Mate plugs aint just plugs but the engine is designed for a particular plug , try for your model yammy try DENSO Hot U standard plugs, or better yet get a BMW , or even a Honda just not that 2 stroke rubbish


    Gingermick,

    Have you done any Leak Tests for escaping Air abound the carb?

    ALSO;

    Would you mind telling Ashore what to do................

    I have just fixed an "ISSUE" with my Honda H100 2 Stroke
    It had Water in the Gearbox and Diff oil.

    Made some nice mayonaise

    Normal bike is a Goose.........Guzzi for the Unknown
    Navvi

  12. #26
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    Jun 2005
    Location
    Helensburgh
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    7,696

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    Fixed it yet? Another issue may be the float bowl vents, you would be better off just rebuilding the carby, after you find it under the fairing that is. Floats sink, vents block up, gaskets leak, needle & seats dribble etc.
    CHRIS

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