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Old 02-16-2009, 12:25 PM   #21
Scorpio
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We should have our own version of mythbusters to determine the true cause.
I'll be the test pilot.
Who wants to donate the bike?
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Old 02-16-2009, 12:27 PM   #22
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I'd say when it comes down to it....rider error. He should have been more cautious as he approached slower traffic. You gotta commit when overtaking other riders, no time for second guessing.
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Old 02-16-2009, 12:39 PM   #23
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He had already matched the speed of the other two riders and seemed to be in control. He wasn't in a turn. He shouldn't have been holding the clutch, and I don't see why he would stomp the brake.

I've seen this on the street before. Tranny/final drive failure or anything that would suddenly stop the drive wheel. The back tire instantly stops (smokes) , loses traction and tries to pass the front tire. Rider on the ground faster than he can blink.
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Old 02-16-2009, 12:45 PM   #24
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The back tire instantly stops (smokes) , loses traction and tries to pass the front tire. Rider on the ground faster than he can blink.
The tyre looks like it is still spinning, but hard to say. I still think he just popped a downshift and lost the back. If you notice the back comes up, which is a symptom of acceleration (back comes up not down under acceleration). He could have simply popped the downshift, bike slides left to right which also causes smoke, and then washed the front by applying the front brake (panic from the slide).

Not ruling out the possibility of a rear end malfunction but watch the rear of the motorcycle it comes up and then slides left to right... then the front washes out.
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Old 02-16-2009, 12:47 PM   #25
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It looks to me....


as the rider should of never been allowed on the track.
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Old 02-16-2009, 12:52 PM   #26
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It looks to me....


as the rider should of never been allowed on the track.
As always so insightful I think he was so happy to just past the guy with the camera he didn't know what to do about the other guy and shat his pants....
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Old 02-16-2009, 12:59 PM   #27
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That could make sense too. But I don't think he had time to even twitch on the front brake - he had no clue he lost the rear. I don't really see the rear come up (not sayin it's not - just can't make it out myself). Either way, I think it was loss of traction on the rear that put him down. Just another thought - wouldn't the gyroscopic action of the wheel suddenly stopping cause a lift in the rear too? Or am I thinking of that backwards? Oh well - I guess my point is, I've seen riders dumped just like this and it was not at all operator error - these are things I think about when I'm doing highway speed in heavy traffic I mean - thinking about the stress we put on these machines... at what point does a wheel bearing fail, and how much warning would I have??? Not a happy thought.
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Old 02-16-2009, 01:45 PM   #28
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I see what you're talking about now - I was thinking at the moment of the dump you saw the back end come up. Yeah, he was clearly deceling hard - but it seemed to be in control. Maybe he did dump the clutch or grab the wrong gear. It clearly took HIM by surprise.
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Old 02-16-2009, 01:52 PM   #29
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Damm, I'm glad I only ride on the street. Nothing bad happens there
NAWWWWWWWWWWWWW u right..



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I think he wrecked. but may be wrong.
Idk DR. but I think you might be right.



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v twins are REALLY bad about lucking rear wheel up when down shifting. I have dropped mine down at the wrong moment and it swap on me.

yes they are
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Old 02-16-2009, 03:06 PM   #30
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I see what you're talking about now - I was thinking at the moment of the dump you saw the back end come up. Yeah, he was clearly deceling hard - but it seemed to be in control. Maybe he did dump the clutch or grab the wrong gear. It clearly took HIM by surprise.
One other thing to note, watch the motorcycle after the wreck. The back tire is still moving under power. Watch near the end (when the camera guy gets close to it) it fishes all the way around like 5 times to almost a complete stop, then the back tire catches and spins it around again (the other direction) almost hitting the camera guy.

This Watson is why I don't believe there was a malfunction aka lockup of the rear end. He popped a downshift and lit the back tire up, making it slide!
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Old 02-16-2009, 03:10 PM   #31
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v twins are REALLY bad about lucking rear wheel up when down shifting. I have dropped mine down at the wrong moment and it swap on me.
Wow that has to be the worst post I have ever made, made me sound like I have no education. Should have said v twins are really bad about locking the rear wheel up when down shifting. I have dropped mine down at the wrong moment and had it swap on me.
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Old 02-16-2009, 03:17 PM   #32
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Wow that has to be the worst post I have ever made, made me sound like I have no education. Should have said v twins are really bad about locking the rear wheel up when down shifting. I have dropped mine down at the wrong moment and had it swap on me.
It's not that bad....

You should see the late night threads we had when this site first started.
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Old 02-16-2009, 03:20 PM   #33
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Wow that has to be the worst post I have ever made, made me sound like I have no education. Should have said v twins are really bad about locking the rear wheel up when down shifting. I have dropped mine down at the wrong moment and had it swap on me.
ha ha, we knew what you were saying bro. Made perfect sense to me the first time.

Two cylinder motorcycles have relatively bigger pistons that four cylinder bikes, which as everyone knows creates more torque at lower rpms (duh right). When you have that much torque at the lower end of the rpm range you can get into trouble if you pop a downshift at the wrong time. Mainly when the motorcycle is coming off a fast straight, as in this case. Maybe he hit two gears down... you can't tell.
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Old 02-16-2009, 03:38 PM   #34
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look at his brake side foot right before the crash,he MONKEY STOMPED on the rear brake just long enough.IMO he was tryin to back it in.no malfunction,maybe a loose screw between the handdle bars and seat though.....
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Old 02-16-2009, 05:30 PM   #35
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We should have our own version of mythbusters to determine the true cause.
I'll be the test pilot.
Who wants to donate the bike?
!
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