dna 50 not starting

Discussion in 'The Workshop' started by phill82, Feb 20, 2015.

  1. phill82

    phill82 Member

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    87
    Hi i have a dna 50 01 reg its got spark but want run got fuel in cadb just want fire up can anyone help
     
  2. scubabiker

    scubabiker NITROJUNKIE

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    compression?
     
  3. phill82

    phill82 Member

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    87
    Loads of compression
     
  4. scubabiker

    scubabiker NITROJUNKIE

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    7,321
    how much? might be worth checking your reeds too? or maybe the plug is failing under load, try first just getting a new plug
     
  5. Stevep

    Stevep Well-Known Member

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    5,898
    Did you test the compression with a tester, or with your finger? Or just by the way it feels when you use the Kickstart?
     
  6. phill82

    phill82 Member

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    87
    Finger in plug hole
     
  7. scubabiker

    scubabiker NITROJUNKIE

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    7,321
    well measure the compression and go from there
     
  8. phill82

    phill82 Member

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    87
    Could it be chock as there is no power to it at all
     
  9. phill82

    phill82 Member

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    87
    Choke
     
  10. scubabiker

    scubabiker NITROJUNKIE

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    7,321
    measure your compression first, then go from there
     
  11. phill82

    phill82 Member

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    87
    I dont have the tool to do it
     
  12. scubabiker

    scubabiker NITROJUNKIE

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    7,321
    ask around if you can borrow one from a friend or something
     
  13. Stevep

    Stevep Well-Known Member

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    5,898
    If you haven't got the tools to do the job, then take it somewhere that has. It's all well and good being a wannabe 'I can look after my own stuff thank you' mechanic, but if you haven't got the tools to do the job, or the right knowledge to do it, then you are only putting yourself at risk.
    You can't measure compression with your finger in the plug hole, you may as well stick it up your arse and fart for all the good that will do, you'll probably get the same effect; finger blown out the hole.
    Your engine needs a minimum of 90psi to start. Tell me you can measure that with your finger.
     
    scootzmadness likes this.
  14. phill82

    phill82 Member

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    87
    Y u been nasty for well piston was hitting the plug as i striped the engine down
     
  15. Stevep

    Stevep Well-Known Member

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    5,898
    Dont mean to come across as nasty, but i do mean to come across in a forceful way in situations like this.
    It's quite simple, you haven't got the correct tools to diagnose the job correctly.
    There is no mention above as to the piston hitting the spark plug.
    If you had a compression tester, you would have found that the piston was hitting the plug before you started stripping the engine down, because thats where the tester screws in.
    Spark + Fuel + good compression = GO!
    Spark + Fuel + bad compression = NO GO!
    Go buy a compression tester. They are less than £30.
     
    scootzmadness likes this.
  16. scootzmadness

    scootzmadness Left the forum.

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    ive dug out my little "my bike wont start" speech just for you.
    you need three things for a bike to run.
    first is COMPRESSION - NO COMPRESSION NO POINT LOOKING AT ANYTHING ELSE.
    a compression tester can be bought at any good store like Halfords or machine mart for around £15 and you will need it more than once, trust me. invest in the tools. don't waste yours and our time by saying itll blow my finger off, 10psi will blow your finger off just as hard as 110psi. its the idiots test.
    you need a minimum of 90psi for the engine to even start but 110-120psi of compression is a good healthy top end. don't bother looking at anything else until you have this. youll be wasting yours and ours time.
    then you need FUEL. NO FUEL NO GO. make sure fuel is getting into the engine, its quite simple, take the plug out and make sure its dry, put it back in, crank the bike over a few times, take plug out and if its wet theres fuel getting through, if its dry then fuel isn't getting to the engine, then go back through the fuel system (carb will be first port of call if fuel isn't getting through).
    then you need SPARK againg NO SPARK NO GO. quite simple. take the plug out, put it back in the cap, rest the metal bit against the frame or the engine (must be metal) and have a friend or family member crank the bike over, look at the plug you should have a nice strong blue consistent spark. if you don't have a strong consistent blue spark your bike wont go and youll need to go from there.
     
  17. scubabiker

    scubabiker NITROJUNKIE

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    also, steve, i farted, what should the compression be? i want to know the pressure of a fart now! why is my mind so stupid like that!
     
    Stevep likes this.
  18. scubabiker

    scubabiker NITROJUNKIE

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    have you got a pic of the plug so we can see how its been running?
     
  19. scootzmadness

    scootzmadness Left the forum.

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    at a guess a fart would be around 25-30psi.......
    now I want to try measure the psi of a fart....
    thankyou very much scuba!
     
    Stevep and scubabiker like this.
  20. phill82

    phill82 Member

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    87
    Hi dose anyone have a nrg power or runner engine lc or ac
     

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