Total Mass...aka Weight - Kawasaki Versys Forum
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post #1 of 19 (permalink) Old 07-07-2019, 03:43 PM Thread Starter
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Total Mass...aka Weight

Jets need to be weighed periodically. So how does one weigh a 150,000 pound jet?

Ah yea a bathroom scale will not cut it, so there are commercial scales that fit under the landing gear to accomplish the task. Position the scale under each gear strut and note the reading. Then add all 3 together and presto you have the weight of the jet.

A guy can do the same thing with your motorcycle and in many cases you can use the bathroom scale.

I just weighed my 2015 Versys 650. First I installed a paddock stand on each end to get the wheels off the ground then slide the scale under the wheel and drop the bike down unto the scale. Do each wheel and record the weight readings.

My rear was 235 lbs and the front was 218 lbs. Combine the two and the weight of the green machine is right at 453 lbs. I have about 2 gallons of gas in the tank.

Also if you were wondering about the weight bias/balance of your machine this method will tell you which wheel supports the most static weight.
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post #2 of 19 (permalink) Old 07-07-2019, 04:12 PM
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Good job. Now, do as your doctor says and quit jacking up your back. Lol.
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post #3 of 19 (permalink) Old 07-07-2019, 05:02 PM
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i have a truck scale on the farm Ezeey Peezy.
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Smooth is fast.
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post #4 of 19 (permalink) Old 07-07-2019, 07:45 PM
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I have 60 ton weighbridge at work , so just drive in and get the weight.
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post #5 of 19 (permalink) Old 07-08-2019, 02:55 PM
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Total Mass vs Weight

Tim - being an ATP holder, I'm surprised that you got MASS and WEIGHT confused.

In science and engineering, the WEIGHT of an object is related to the amount of force acting on the object, either due to gravity or to a reaction force that holds it in place, while MASS is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied.

Even tho' I KNOW that there's a difference - sometimes it's STILL hard to wrap my mind around exactly WHAT that difference IS....



I KNOW that your weight will be DIFFERENT in differing gravities such as in space, but your mass remains constant.

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post #6 of 19 (permalink) Old 07-08-2019, 03:45 PM
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Since you brought it up... Wouldn't mass then be affected by rolling resistance and wind drag?

I mean, as long as we're confusing things.
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post #7 of 19 (permalink) Old 07-08-2019, 11:01 PM Thread Starter
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Originally Posted by fasteddiecopeman View Post
Tim - being an ATP holder, I'm surprised that you got MASS and WEIGHT confused - In science and engineering, the weight of an object is related to the amount of force acting on the object, either due to gravity or to a reaction force that holds it in place, while Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied.

Even tho' I KNOW that there's a difference - sometimes it's STILL hard to wrap my mind around exactly WHAT that difference IS....



I KNOW that your weight will be DIFFERENT in differing gravities such as in space, but your mass remains constant.
Eddie it was Catholic Mass. I weighed my bike after church...Lol.

Just kidding!
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post #8 of 19 (permalink) Old 07-08-2019, 11:12 PM
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Whoa... That's heavy.

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post #9 of 19 (permalink) Old 07-09-2019, 12:27 AM
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At long last this forum is getting some heavy
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post #10 of 19 (permalink) Old 07-09-2019, 08:30 AM
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Eddie it was Catholic Mass. I weighed my bike after church...Lol.

Just kidding!
Now THAT'S funny!
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post #11 of 19 (permalink) Old 07-09-2019, 09:09 AM
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"My rear was 235 lbs"

Wow Hawkerjet, you seriously need to go on a diet.
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Forty years away from 2 wheel fun. Sure is great to be back smelling the roses!!!
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post #12 of 19 (permalink) Old 07-09-2019, 04:52 PM Thread Starter
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"My rear was 235 lbs"

Wow Hawkerjet, you seriously need to go on a diet.
Man that would indeed be one Lard Arse.

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post #13 of 19 (permalink) Old 07-09-2019, 04:56 PM
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"My rear was 235 lbs"

Wow Hawkerjet, you seriously need to go on a diet.

Ed
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post #14 of 19 (permalink) Old Yesterday, 09:24 PM
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Actually, mass would be increased by both the stored (potential) energy (fuel) of the machine itself and any movement (kinetic energy). Einstein’s E=mc(2) is actually an expression of mass and not energy, but states energy and mass are interchangeable. It was originally written as m= E/c(2). In this equation, Mass includes the all forms of energy (E) of the object, whether transformed from potential to kinetic or not, including both kinetic and potential.

Leave it Einstein to make things more difficult!

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Since you brought it up... Wouldn't mass then be affected by rolling resistance and wind drag?

I mean, as long as we're confusing things.
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post #15 of 19 (permalink) Old Yesterday, 11:08 PM
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Originally Posted by Shibumik View Post
Actually, mass would be increased by both the stored (potential) energy (fuel) of the machine itself and any movement (kinetic energy). Einstein’s E=mc(2) is actually an expression of mass and not energy, but states energy and mass are interchangeable. It was originally written as m= E/c(2). In this equation, Mass includes the all forms of energy (E) of the object, whether transformed from potential to kinetic or not, including both kinetic and potential.



Leave it Einstein to make things more difficult!
I thought it would be fun to bring up the idea that forces acting on an object could change the physical characteristics of that object.

Just something to geek out on for a minute.
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post #16 of 19 (permalink) Old Yesterday, 11:36 PM
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I thought it would be fun to bring up the idea that forces acting on an object could change the physical characteristics of that object.

Just something to geek out on for a minute.
Yes they can! That’s what happens when a recovering physicist catches your post!
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post #17 of 19 (permalink) Old Today, 06:34 AM
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Every time I load up for a trip I hit the scales to make sure I have good weight distribution.

We hang our unmanned aircraft so we can get cg which is very important.

I also find it valuable when loading the bike , or truck, or trailer because it does affect handling.

It is pretty easy to get front and back cg but not easy to get the side to side or distance from the ground.

The rule of thumb is to have heavy weight as low on the bike as possible and evenly distributed side to side.

My Versys Travels:


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post #18 of 19 (permalink) Old Today, 08:36 AM Thread Starter
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Every time I load up for a trip I hit the scales to make sure I have good weight distribution..
I don't have a trunk or side bags so when I travel I strap a big duffel on the rear seat. A bonus of having 30 or so pounds back there is a smoother ride.

The extra weight causes the rear shock to ride a tad lower in the stroke and takes the edge off of the bumps. Similar to putting a load in the back of your truck causing a smoother ride.

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post #19 of 19 (permalink) Old Today, 12:50 PM
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I don't have a trunk or side bags so when I travel I strap a big duffel on the rear seat. A bonus of having 30 or so pounds back there is a smoother ride.

The extra weight causes the rear shock to ride a tad lower in the stroke and takes the edge off of the bumps. Similar to putting a load in the back of your truck causing a smoother ride.
PLUS - it's LESS than the weight of a passenger, which the Versys is 'set-up' for!
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