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98 vz800 fouls plug cobra ex - Cars & Trucks

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Hi Donald, Make sure the heat range of the plugs you're using is correct as the first step. If they are correct, suspect worn injectors, worn piston rings or valve stem oil seals. Regards John

Posted on Jul 21, 2013

  • donald Jul 21, 2013

    Ya john just use what book said should i gap them a little more or stay factory

  • I think the factory knows best. Usually a new plug is gapped at about 0.90 mm and reused is set at 1.00 mm. Regards Johna


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