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1983 GSX250 idle problem

Discussion in 'Suzuki 250cc Twins' started by gainey, Feb 19, 2015.

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  1. gainey

    gainey Active Member

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    Hi grey import
    Thanks for the advice I joined and got the manual.
    I check the valve clearances last night only one was a little tight on the exhaust side but other than that the others were all good.
    I think the issue has to be in the carbs.i pulled the diaphrams out but I could not see any holes or tears in them any suggestions on what to do next ??
     
    gainey, Mar 18, 2015
    #21
  2. kiffsta

    kiffsta Senior Member

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    if its racing on idle, there has to be an air leak somewhere
     
    kiffsta, Mar 18, 2015
    #22
  3. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Check your carb boot and airbox seals, an air leak will result in a high idle or the revs dropping below idle speed when you release the throttle or give the bike a tiny bit of throtle
     
    Linkin, Mar 18, 2015
    #23
  4. gainey

    gainey Active Member

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    Thanks everyone for your help so far if you watch the vid on the previous page you will see what I mean with the idle
    I plane on putting silicone paste on the top cover off the diaphram and put Vaseline on the diaphrams hopefully that may do the trick
     
    gainey, Mar 19, 2015
    #24
  5. kiffsta

    kiffsta Senior Member

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    Make 100% the diaphragms are seated in the groove in the top of the carby before fitting the lid
     
    kiffsta, Mar 19, 2015
    #25
  6. Ben Mulligan

    Ben Mulligan Well-Known Member Premium Member Contributing Member

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    Where does it mention the correct pilot screw positions etc? I can't find it in mine.
    I'm having a different issue, my bike wont start, it gets close and when i restrict the airflow with my hand over the intake I get a small glimmer of hope but i've rejetted teh carbs so i might go back to standard size until i can sort it.
     
    Ben Mulligan, Mar 28, 2015
    #26
  7. gainey

    gainey Active Member

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    Hi Ben
    I did read it in the manual somewhere but around 1 1/4 to 1 1/2 turns out
    if it's not firing check the plugs and the valve clearances
    Also check the vacuum line of the tank it has a one way valve my one was wrecked which was letting fuel into the back if the carby so as a temp measure we plugged the vacuum line off the tank and the carby and it fired up
     
    gainey, Mar 29, 2015
    #27
  8. Ben Mulligan

    Ben Mulligan Well-Known Member Premium Member Contributing Member

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    Thanks for the tip, I set mine to 2 1/2 turns out, and its racing so I might reset them and try again. Fuel line is good now.

    If I can stop mine racing up ill let you know how I did it
     
    Ben Mulligan, Apr 19, 2015
    #28
  9. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Sounds to me like it is running on one cylinder. Or do you already know that?
     
    maelstrom, Apr 19, 2015
    #29
  10. gainey

    gainey Active Member

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    We took the covers off the carb diaphragms and the diaphragms themselves were fine so put some hi temp silicone around the covers and that stopped it racing up so I guess it was a vacuum leak we have since ordered a new petcock repair kit but we haven't tried it yet as I have been painting the tank and other parts
     
    • Like Like x 1
    gainey, Apr 19, 2015
    #30
  11. Ben Mulligan

    Ben Mulligan Well-Known Member Premium Member Contributing Member

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    Good news, cheers mate
     
    Ben Mulligan, Apr 19, 2015
    #31
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