Question about 1992 kawasaki GT 750

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Kawasaki gt550 won't start from cold! even with choke!!

I have had my kawasaki gt550 engine bored out to a 615, im running 125 main jets and my air mixture screws are 2 and half turns out. when i start from cold, full choke, it only fires up on numbers 1 and 4 but after a while it kicks into 3 cylinders, then 4 cylinders.
i have replaced all rubber manifolds and also cleaned the carbs and jets out. i have also balanced the carbs.
Plugs are still abit white. Is it just lean?
Whats the problem? help?!

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  • Anonymous Apr 24, 2009

    Thank you johnnyraptor, will try this. Will bigger main jets make it better aswell?

    To tombones49, yes we did also do this also.

  • juliecleaver Apr 24, 2009

    Thank you johnnyraptor, will try this. Will bigger main jets make it better aswell?



    To tombones49, yes we did also do this.

  • tombones May 11, 2010

    You balanced the carbs. Did you syncronise them so the slides all crack open at the same moment?

  • Anonymous Mar 18, 2014

    how do I find piston number 1

  • Anonymous Mar 18, 2014

    which piston is number 1?

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When you get the bike started you need to adjust the pilot air screw. here's how= turn in clock wise until engine falters(mark that spot with a pin)then out counterclock wise until the engine falters(mark that spot also) then put the screw in half amount adjustment of the two marks.that will take care of if it is to lean or to rich.make sure the engine is good and warm before doing so.

Posted on Apr 24, 2009

  • johnnyraptor Apr 24, 2009

    when you get the bike started you need to adjust the pilot air screw. here's how= turn in clock wise until engine falters(mark that spot with a pin)then out counterclock wise until the engine falters(mark that spot also) then put the screw in half amount adjustment of the two marks.that will take care of if it is to lean or to rich.make sure the engine is good and warm before doing so.

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Posted on Jan 02, 2017

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