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Carb needle sizes.

Discussion in 'XJ Modifications' started by Maxim700, Apr 9, 2007.

  1. Maxim700

    Maxim700 Member

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    Does anyone know if stock yamaha needles get richer or leaner with an increase in number? My stock needle should ne a y-20 according to the manual. My bike has a y-19.

    Is this a richer needle? I ask richer because I have a 4-1 exhaust and when I added a washer to the needle the bike had zero power from idle.

    I am waiting for a Kand N stock replacement air filter and am wondering if this would compensate for the unusual needle. If it is actually leaner I may have to change it to work with the filter.
     
    Maxim700, Apr 9, 2007
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