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dt 125 trouble

  • 13-07-2013 8:27pm
    #1
    dt125 trouble
    Registered Users Posts: 7 ✭


    hey huys recntly got m hands on a yamaha dt 125 x engine loom etc, i think its 01, problem is now i am not getting any spark, it is turning over and all just not a jot out of the spark, where do i start checking with voltmeter to rule out bad components? what i found strange was at first i had a bit of spark, but it was only one spark when you start turning over the engine not continuos ( as in no matter how long you turn over it only sparks the once, but when you stop and turn over again it sparks once again and thats it) but now i get nothing at all thanks for any help


Comments

  • #2
    Interceptor
    Registered Users, Registered Users 2 Posts: 3,180 ✭✭✭Interceptor


    Its defnitly b0rked mate.

    Get thee a new sparkle plug and some fresh fuel, try to start it repeatedly and pull the plug out to check it is wet with fuel. One spark does not a full combustion cycle make. Did it ever start for you? If yes, then its not suddenly developed a complex electrical fault. Fuel? Compression? Dead badger in the airbox?


  • #3
    dt125 trouble
    Registered Users Posts: 7 ✭dt125 trouble


    no it never started since ive had it, like i say it was just sparking the once which i couldnt understand and i knew this wasnt enough, but surely this is a symptom of something deteriorating? but now its doing nothing no spark whatsoever ive tried this spark plug in another one and its sparking no problem


  • #4
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,907 ✭✭✭✭CJhaughey


    Is the flywheel slipping on the end of the crank?
    If the key shears it can spin around.


  • #5
    dt125 trouble
    Registered Users Posts: 7 ✭dt125 trouble


    CJhaughey wrote: »
    Is the flywheel slipping on the end of the crank?
    If the key shears it can spin around.

    not that i know of mate i would check this how?


  • #6
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,907 ✭✭✭✭CJhaughey


    dt125 trouble wrote: »
    not that i know of mate i would check this how?
    Take the cover off and see when you kick it over if it is slipping.
    If you have a timing light it should also show you where its firing.


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  • #7
    dt125 trouble
    Registered Users Posts: 7 ✭dt125 trouble


    CJhaughey wrote: »
    Take the cover off and see when you kick it over if it is slipping.
    If you have a timing light it should also show you where its firing.

    the left hand cover is it? it is electric start, dont have a timing light though


  • #8
    dt125 trouble
    Registered Users Posts: 7 ✭dt125 trouble


    hey guys ive been studying wiring diagram on the 125 x, trying to figure out the sidestand switch now as it might be reason getting no spark, anyway i have 2 black and white wires 1 for sidestand other for clutch, only thing is its showing me on diagram to connect them to anti-theft alarm which is an optional thing by the looks of it, i dont have one with my loom, anyone any ideas where it would connect too then?


  • #9
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,907 ✭✭✭✭CJhaughey


    Is the engine in the bike or is it on a bench?


  • #10
    dt125 trouble
    Registered Users Posts: 7 ✭dt125 trouble


    CJhaughey wrote: »
    Is the engine in the bike or is it on a bench?

    on a bench mate....


  • #11
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,907 ✭✭✭✭CJhaughey


    They are probably earthed and when the contact is broken the bike won't start.
    Try connecting the sidestand and clutch wires to negative/earth and see if it fires up.


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