whistling motor

Discussion in 'Motorized Bicycle General Discussion' started by beentryin, May 9, 2010.

  1. beentryin

    beentryin New Member

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    i ran my motor about 20 miles today brought it home and took it out about 3 hours later.and it has a whislte to it sounds like its coming from the clutch
     
  2. CoastalCruiser

    CoastalCruiser New Member

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    Intake manifold leak perhaps?
     
  3. psprat496

    psprat496 New Member

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    I notice these same sounds as well. It's not the clutch gears but when I travel at higher speeds the engine "whistles" loudly. Is this really the sound of an air leak?
     
  4. Mac

    Mac New Member

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    One of my PK80's devoloped a "whistle" after about 100 miles, more of a gear "Howl", looked it over, the keyway on the small pinion gear seemed to be jammed up, removed the loc screw, used a bit of loc-tight{blue), put a new keyway on, has not been back since. Hope that helps.
    Mac
     
  5. metalliatic

    metalliatic New Member

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    mine really screams. i have a bigger intake, carb, and expanssion chamber exaust, with a billet head. i think it might just be the air being sucked in to the carb.
     
  6. beentryin

    beentryin New Member

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    no this is at idle and if i pull my clutch in real tight it goes away
     
  7. psprat496

    psprat496 New Member

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    Oh, we'll that's most likely the sound of your clutch engaging. When you pull your clutch is it easily pulled or stiff?
     
  8. corgi1

    corgi1 New Member

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    Did you put a finger tip size dolop of grease on the small gear that drives the clutch gear?(inside the clutch cover)
     
  9. corgi1

    corgi1 New Member

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    Could the clutch pin and ball need lube or be starting to touch the release lever?
     
  10. metalliatic

    metalliatic New Member

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    mine does it at high rpms
     
  11. beentryin

    beentryin New Member

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    its alway been kinda stiff,but its a smooth stiiff if you know wat i mean.i greased the small gear a few days ago,do i just pull the bar out and put grease on it?
     
  12. demac

    demac New Member

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    it honestly just sounds like the clutch cover, where the gears are located. trying holding your hand on it, hear it that dampens the vibration. You can buy a cover that dampens the noise and wont hear a screech or whistle. ""sickbikeparts"" pretty sure.
     
  13. corgi1

    corgi1 New Member

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    Yes ,just a mild greasing ,all over it............Idle was why I thought of the bucking bar and ball ,under the cover w/the clutch lever in the center of the drive gear,,,a clutch cover damper (above) sounds good too.......If it doesn't stop,you might try small squirts of WD-40 where the intake manifold bolts on,, and carb. conector,etc looking fot a whistling air leak.
     

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