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  • Question about idle

    Took the bike out for a ride today about 100 miles And I noticed when I started the ride the idle was 950 and when I got done the idle was about 1300 RPMs. Now this is off of a cheap digital tach from Amazon, but what would cause this idle to raise after the bike is hot? Is it possible to throttle cables adjusted too tightly? It’s a 2003 road star Silverado with just under 10,000 miles. Replaced the manifold, new gaskets, tune up and the pickup coil was replaced at the same time. 89 octane with sea foam and it’s about 90 degrees today.

  • #2
    The idle should be adjusted hot. It'll be slower when cold when the enricher should be used and speed up as the manifold warms up enough to completely evaporate the fuel coming through.
    Scott B.

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    • #3
      Scott,
      Thanks for the info. I’ll leave it as is now cause I adjusted it back down to 950 or so.

      Comment


      • Horsehammerr
        Horsehammerr commented
        Editing a comment
        Remember not to adjust your idle until it is hot warmed up .

    • #4
      Might be a vacuum leak. My idle was jumping around like that but after I plugged the leak it smoothed right out.

      Comment


      • #5
        texasscott1 is right. It's normal for these bikes to idle low when cold; they have to be *fully hot* before you can set it. I'd give it 20 mins of riding, to be certain, before setting the idle.

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