Question about 2008 Harley Davidson FLHX Street Glide

1 Answer

Massive shaking at idle

Checked motor mounts/ and idle.... only shakes at idle, its not the standard a-motor shake its pretty bad.

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  • valvestem May 13, 2010

    Couple questions. At what RPM is it idling, should be about 1000, which you may know, they do shake quite a bit at idle though. Does it smooth out when revved up some? Any odd noises? You sure both cylinders are firing? That would shake if only one were. I doubt timing is the issue, because there is basically no way it changes itself on it's own. Any mods made lately before the shake issue showed up?

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  • Harley Davidson Master
  • 41,791 Answers

Hi Cmartyn1, and the usual suspects are:
1. Wheels and or tires unbalanced, worn or damaged.
2. Eng ine/ transmission/vehicle not aligned properly.
3. Primary chain badly worn or links tight as a result of insufficient lubrication or misalignment.
4. Engine to transmission mounting bolts loose.
5. Upper engine mounting bracket loose.
6. Ignition timing incorrect/poorly tuned engine
7. Internal engine problem.
8. Broken frame
Good luck

Posted on Jun 11, 2015

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Posted on Jan 02, 2017

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  • 142 Answers

SOURCE: vibration when riding idleing think maybe motor mount how do i chrck it

Check the engine mounts to the frame. these are isolated by rubber and you may have broken one gettin' on it at the light.

Posted on Jun 02, 2009

  • 5 Answers

SOURCE: 07 Street Bob. At 9000 miles, the engine mounts

You have a torn engine mount, if your bike is still under warranty get it to your dealer asap!!!!! The same thing happened to my 08 Superglide, the dealer was quick to fix it as I had no idea as to why my bike was shaking so badly. Also check that your tank mounts are tight too..
Good luck!

Posted on Aug 31, 2009

  • 269 Answers

SOURCE: 03 dyna when slowing from hwy speeds handle bars start shaking

Check the nut on the steering neck. you may want to seriously consider swinging by the dealer as this is such a critical item.

Posted on Sep 25, 2009

1fastbob
  • 301 Answers

SOURCE: Taken 2007 Dyna in twice in 2 weeks for excessive

Harleys sure do some shaking. I would guess it has an issue with an engine mount either loose or worn out. I would try another dealer if one is near you.

Posted on Nov 07, 2009

wd4ity
  • 4565 Answers

SOURCE: engine vibration,new motor mounts,and stabilizier,94dwg help!

Ok, that's better. This is an engine that has run well before but now something is wrong.

I could be a magnet on the stator but usually they'll make a loud knocking noise. But one magnet could have come loose and simply moved. The only way to find out is to pull the primary and the stator. It's much easier to do on that bike than it is a Shovelhead in that you do not have to pull the inner primary. If you find this to be the problem and you replace the rotor, make sure you check the rotor for good magnetism. Don't laugh, we installed on a few weeks ago and the alternator would not generate any electricity. Turned out the rotor magnets didn't have enough magnetism. You could tell by holding a screwdriver to the magnets, the new one just didn't hold the screwdriver like it should have. Installed the old rotor, everything was fine. Harley had a problem with a batch of them and they don't know where they're all at so check it out before you install it.

Also, with that many miles on the bike, you need to check the motor mounts, both front and rear. The rubber will seperate from the metal parts of the mount. Check the upper stabilizer link as well. Check the primary chain adjustment as well.

As long as the engine is running properly and not making a noise or missing, this is the only thing I can think of at the moment.

Good Luck with it.
Steve

BTW: I've got a '94 Wide Glide. I love it. Wouldn't trade it for a brand new Softail.

Posted on Jul 05, 2010

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I need help badly.


Good Day,

The shaking can be caused by a bad motor mount, but could also be caused from the engine when it is idle'ing low and about to stall. The motor mount would also shake the car under braking, so if is doesn't shake whiIe your braking it's probably not motor mount, Is your check engine light? The idle air is another possibilty among other things. I can assist further but I need to know which engine you have the 4 cyl 2.0L or 6.0 cyl 2.5L?

Let me know about the check engine light aswell.

Hope this helps

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