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Thread: 250r kills hard??

  1. 02-25-2010, 02:36 AM #1
    yeppimcody
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    250r kills hard??

    i just rebuly my 84 250r and was riding it to night had to rebuld it because it leand out but any way, it had a jet in it No. 310 so i bought a buch of jets i put the fattest one i got a 540 in it. well any way i was riding down the road at about 3/4th throtel and i just killed hard like i hit the kill switch (witch i did not) i kiked it over started right up no problems i was riding it a round babbying it then i gave it 3/4ths and bam dies agin. i pulled the brand new lug out and it was flat black not wet black?? so i dont no if it was too rich or the istons not broke in so it causes it to kill of my jets wayy to big??? thanks in advance.
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  2. 02-25-2010, 09:58 AM #2
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    RodKnockRacing
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    310 and 540 thats crazy assuming your talkin about main jets
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  3. 02-25-2010, 02:39 PM #3
    yeppimcody
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    well i just rebuilt it and i dint want it to lean out id rather fowel lugs then have it lean out and dum another 200 in to it.
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  4. 02-25-2010, 03:41 PM #4
    yeppimcody
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    i am talking about main jets but is a flat black plug chop to rich or to lean?
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  5. 02-25-2010, 03:51 PM #5
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    fabiodriven
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    A black plug is too rich.
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  6. 02-25-2010, 03:54 PM #6
    yeppimcody
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    evean if its not wet oily black?
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  7. 02-25-2010, 03:59 PM #7
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    you don't go from 310 to 540 that is way too much of a jump. If it was lean and blew it was probably getting air from the low end or intake. Try 2 sizes up from 310
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