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Death wobble caught on tape

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  #21  
Old 06-30-2017, 09:40 AM
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Originally Posted by upflying
Why would a rider keep going with an obvious safety issue with stability? Loose fork bearings, swing arm loose, axles loose?
Something wrong for sure..
 
  #22  
Old 06-30-2017, 09:42 AM
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Originally Posted by roussfam
Something wrong for sure..
could be tire pressure too
 
  #23  
Old 06-30-2017, 09:42 AM
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Originally Posted by jt metal
What is reason behind it? What's the cure to prevent.
Off hand, I'd say it's classic steering head wobble/wiggle/etc. Virtually any motorcycle will do this under the right conditions. It can be contained if caught and dealt with quickly, otherwise it just as quickly becomes a crash like this video shows.

When I have a bike start this I will strongly grip the bars in both hands and hold them stiffly, bring the bike speed down sharply, and lean my weight down over the tank.

A steering damper is a great tool at reducing this. It's not a fix, but it's a great aid. A somewhat tight steering head bearing set sorta achieves a similar damping.

Things that tend to make this problem worse are windshields, handlebar tool bags, no handed riding, one handed riding, sitting straight upright or leaning back. Sometimes a downhill coast seems to exasurbate it as well. There can also be certain frequency combinations that can occurr within an individual bike or bike/rider/gear combination that can trigger it.
 
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  #24  
Old 06-30-2017, 09:43 AM
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Dunno if a "steering stabilizer" would have helped or not. Had this same thing happen to me when riding a Suzuki GS1100E, back in the early '80's. Scary head shake.
Too much weight in his bags?
Sure would like to know the cause.
Is this the same thing that happened to the CHP motor during a Presidential motorcade?
 
  #25  
Old 06-30-2017, 09:45 AM
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This one of many examples that I call "Why I Always Wear Gear..."

Sure, I like to look cool and all, but not enough to lose lots of skin and flesh.
 
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  #26  
Old 06-30-2017, 09:49 AM
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Damn... that's effed up!

Yeah, I noticed his left hand resting on the tank at the beginning of the video.
That's even more crazy knowing that they had been following him because his bike was wobbling.
 
  #27  
Old 06-30-2017, 09:50 AM
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Well, I am damn sure not showing that video to my wife!
 
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  #28  
Old 06-30-2017, 09:52 AM
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That video is spreading fast.
 
  #29  
Old 06-30-2017, 09:55 AM
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Originally Posted by foxtrapper
Off hand, I'd say it's classic steering head wobble/wiggle/etc. Virtually any motorcycle will do this under the right conditions. It can be contained if caught and dealt with quickly, otherwise it just as quickly becomes a crash like this video shows.

When I have a bike start this I will strongly grip the bars in both hands and hold them stiffly, bring the bike speed down sharply, and lean my weight down over the tank.

A steering damper is a great tool at reducing this. It's not a fix, but it's a great aid. A somewhat tight steering head bearing set sorta achieves a similar damping.

Things that tend to make this problem worse are windshields, handlebar tool bags, no handed riding, one handed riding, sitting straight upright or leaning back. Sometimes a downhill coast seems to exasurbate it as well. There can also be certain frequency combinations that can occurr within an individual bike or bike/rider/gear combination that can trigger it.
In theory, strong application of the rear brake should help as well.
 
  #30  
Old 06-30-2017, 09:58 AM
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Damn, he marked his spot with about 50 yards of skin laid down on the highway. The near 360 that the bike did was pretty impressive, before it laid down. Jesus H. Christ, he's lucky that after all that he wasn't run over...
 


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