Are windshields dangerous? - Page 2 - Kawasaki KLR 650 Forum
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post #11 of 18 Old 04-26-2020, 03:15 PM
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I knew those damned things were dangerous.......... Excellent and vivid account of your encounter with a failed cable spare tire carrier, foo.
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post #12 of 18 Old 04-26-2020, 03:31 PM
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Quote:
Originally Posted by Damocles View Post
NOT a motorcycling experience, but . . . it COULD have been! "What if," arises.

Following (in my, "cage") a pickup truck on a ramp leading to an Interstate highway . . . suddenly, a mattress, laid flat into the pickup bed with the tailgate closed, ROSE OUT of the bed completely, and landed on the pavement immediately in front of my vehicle! A, "Jersey barrier" (concrete barricade) was on my left, and merging traffic coming from the right, I had no choice other than . . . running over the mattress. Sorry about that, dude.

Upon analysis, I believe LIFT from the air moving over the bed (Bernoulli effect) levitated the mattress, flinging it to the roadbed. Next time, I hope the driver snubs down his mattress adequately, if he's driving at any speed at all.

Now: WHAT would/should I have done, if this mattress had landed in front of the leading wheel of my motorcycle? What would you do?
I once helped a guy move a very large dog house. I'd estimate it was 3 feet wide, 4 feet long and 4 feet high; a very well-made affair and I'm guessing close to 200 pounds. It was not easy for us to lift into the back of the guy's pickup. Considering how much effort we had to expend to get it into the truck, we didn't think much of it and just put it in with the door facing foward, well toward the front of the bed.

We'd gone a few miles and were driving around 55 mph on a 2-lane blacktop road when we suddenly saw the thing fly out of the back. It actually flew up and over the tailgate, doing some damage to the gate. Having logged many miles in the open bed of a pickup myself, I was amazed that the air could catch and lift something that heavy.

The doghouse was sheathed in metal siding and landed on one side and just slid down the road until it stopped.

As noted by Damocles, Bernoulli's Principle is nothing to mess with. If it can get a C-5 Galaxy off the ground, I guess it can lift a 200-lb. doghouse at 55mph.................
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post #13 of 18 Old 04-27-2020, 10:17 AM
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On the windscreen issue, I tend to agree with the urban myth line of thinking.....BUT if you are in stalling aftermarket windshields on your bike(s) keep in mind that there are different types;

- Acrylic (plexiglas) is relatively cheap, doesn't scratch easily but shatters into jagged shards - I tried modifying one on my touring bike and was horified by how easily it broke into jagged chunks.

- Polycarbonate; more expensive, scratches more easily (manufacturer's use hard coatings to counteract this) but much, much stronger......about 25X stronger than Acrylic.

Once I knew the difference, I tossed my acrylic shield in the garbage and ordered a good poly shield. I imagine that most OEM shields are poly for liability reasons and I stick with the stock, short shield for my "offroad centric" KLR riding for safety reasons.


2 cents,
Dave
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post #14 of 18 Old 04-27-2020, 06:18 PM
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I sure hope they are not dangerous. All of my bikes for the last 40 years, with the exception of my Triumph 650 twins, have had windshields or fairings of some type. What is terrible is that a motorcycle instructor is putting out bilge like this to new riders. Someone needs to tighten him up.

On the subject, I am probably unique in needing a handlebar mounted windscreen for my heavily modified 08. I rode it recently on a gamey, cool and blustery day and sure missed having a windscreen. A DR650 rider recommended a Slipstreamer, which I'm looking into.

Mike
Show a man a road, and he'll want to travel down it-James Michener

Last edited by Navigator; 04-27-2020 at 06:25 PM.
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post #15 of 18 Old 04-27-2020, 09:22 PM
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Quote:
Originally Posted by Navigator View Post
I sure hope they are not dangerous. All of my bikes for the last 40 years, with the exception of my Triumph 650 twins, have had windshields or fairings of some type. What is terrible is that a motorcycle instructor is putting out bilge like this to new riders. Someone needs to tighten him up.

On the subject, I am probably unique in needing a handlebar mounted windscreen for my heavily modified 08. I rode it recently on a gamey, cool and blustery day and sure missed having a windscreen. A DR650 rider recommended a Slipstreamer, which I'm looking into.
I always preferred the Quick Removal Knob hardware of National Cycle shields vs the bolts & clamps of Slipstreamer.

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting
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post #16 of 18 Old 04-28-2020, 08:23 AM
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Quote:
Originally Posted by RANGER295 View Post
My coworker who is fairly new to motorcycles too rides a DR650...She says that they told her in her motorcycle safety class that you run the risk of decapitation from the wind shield and the instructor claimed that it happened to his best friend right in front of him while they were riding together.
Hey thanks for posting that, Ranger295. It's an interesting point, and it made me think of a different safety solution:

I thought about surviving an impact sufficient to take my head off...I thought about all the other injuries that would likely accompany such a wreck. I've seen plenty of bilateral femurs and pelvic fractures from going into the bars, blunt chest and abdominal trauma, cervical spine and head injuries...Roadrash.
So...
  • Modern medicine can keep you breathing (and paying) through just about anything these days.
  • Hell is a place inside any hospital with an ICU or a burn unit.

Maybe I'll sharpen my windshield as a safety feature.

Last edited by alphashifter; 04-28-2020 at 09:40 AM.
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post #17 of 18 Old 04-28-2020, 02:12 PM
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Quote:
Originally Posted by pdwestman View Post
I always preferred the Quick Removal Knob hardware of National Cycle shields vs the bolts & clamps of Slipstreamer.
I'll have to look into National Cycle. I've heard of them but never purchased one of their products.

Mike
Show a man a road, and he'll want to travel down it-James Michener
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post #18 of 18 Old 04-29-2020, 10:26 PM
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I heard some riders go down by using too much front or rear brakes. So, I’m considering brakes dangerous and disconnecting mine.
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