Sound of the original harleys

Discussion in 'General Harley Davidson Topic' started by recharge, Sep 9, 2011.

  1. recharge

    recharge Member

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    I pulled up beside a 1992 harley and what I noticed is the sound of it idling and compared to my 11 eg mine ran alot smoother. My question is the difference between the fuel injection and carburetor or was there a different cam used? I do like the sound of a older harley idling.
     
  2. glider

    glider Veteran Member

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    Many differences between the 92 and the 11 HD's such as cam, induction type and above all the idle speed. Your bike idles at 1000 RPM +/- whaeras that bike was usually set to idle around 750 +/-. Big difference in engines too.
     
  3. Redfish-Joe

    Redfish-Joe Senior Member

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    The main reason the fuel injected bikes idle high it to keep all the electronics going at a specified operating voltage. Carbed bike don't have this issue. You can idle it down to a slow lope BUT you may be starving the top end of oil.
     
  4. The Tourist

    The Tourist Banned

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    I can't always tell from the saddle, but I hear stuff from friends.

    Betty has lots of engine mods, but I cannot honestly say I hear a faster idle. In fact, my dyno run sheet shows the curves beginning at somewhere around 600 to 800 RPM.

    You could also make the case against that idea. One of the regulars at the Harley shop is a woman who rides a full-dress bike (and I mean 'full') and she also works for Gates, the company that makes Gilmer belts.

    While she had absolutely no idea what I had done to Betty, her first comment was, "It sounds 'cammy'..."

    Granted, she works around bikes all day long. And being the thick-headed idiot I am, I've watched my mechanic drive my bike and other than the thump of a V-Twin, I don't hear a thing.
     
  5. Breeze3at

    Breeze3at Well-Known Member

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    Air/fuel ratio and timing also play a part. My '92 sounds soooo much better at idle than my '07, even though the idle speed is around 900. ESPECIALLY when I pull the choke knob out.
    My shovelhead will idle so slow, you can hear each cyl. fire. The timing on it is retarded because it's kick start only.
     
    Last edited: Sep 9, 2011
  6. The Tourist

    The Tourist Banned

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    That could be it, you have something to compare it to. I have a Sportster, and compared to that, Betty sounds like she's going in slow motion.
     
  7. mmcbeat

    mmcbeat Member

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    I miss the "potato, potato, potato" idle of my '05. What I do not miss is fooling with the enricher and the fuel cut off.
     
  8. The Tourist

    The Tourist Banned

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  9. gasbag

    gasbag Active Member

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    Sounds like a little horse at a slow gallop.:D
     
  10. The Tourist

    The Tourist Banned

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    I went back to YouTube and I found a whole bunch of older bikes that are filmed with sound.