I put my RC on the scale and... - Honda RC51 Forum : RC51 Motorcycle Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old 09-18-2014, 02:50 AM Thread Starter
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
I put my RC on the scale and...

Rolled my RC out on a perfectly leveled surface, having the chance to take one more picture of it , .... ....



.....my bathroom scale and my camera.
The scale is tricky cause once it stabilizes on a number, it shuts off automatically after 5-6 seconds.
So the numbers may be of a couple of pounds, but they will give us a ball park of the idea. After all, personally I don't care for a couple of pounds difference on the weight of my RC, since I don't race it.

So I put the scale underneath the rear wheel, with the front wheel touching the ground (no front stand)



Then I tighten the bike to an upright position, minding the belt not to lift or pushing it downwards





This is what I got



My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 09-18-2014, 02:52 AM Thread Starter
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Now I put the bike on the stands, front and back







The front lifts the tire off the ground less than 10mm





My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
post #3 of 15 (permalink) Old 09-18-2014, 02:58 AM Thread Starter
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Put the scale underneath the rear tire



and removed the rear stand



Almost 4 lbs heavier by lifting the front wheel for like 5mm! ! ! !

Then I measure the front.

Unfortunately the scale couldn't fit inside the stand so I had to measure it without the stands, just by balancing it to an upright position again. And I got this



So summing up the results:

Rear without stands



Rear with front stand on



Front without stands



I guess I would read a lot more than 4 extra lbs on the front, if the scale could fit inside the stand, since the rear stand lifts the bike a lot more than 5mm


My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
 
post #4 of 15 (permalink) Old 09-18-2014, 03:02 AM Thread Starter
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
So, using a paddock stand, proved to be messing with the measurements as expected.

If I add the two numbers I got without the stand, it's

235.2lbs (106.68kg) + 231lbs (104.77kg) = 466.2lbs (211.45kg)

That number makes total sense to me, since my bike has all the fluids in it and a full tank to the cap (18lit)

What do you guys think?

P.S> I still don't get it, why the rear is heavier than the front


My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!

Last edited by MakisRC51; 09-18-2014 at 03:12 AM.
MakisRC51 is offline  
post #5 of 15 (permalink) Old 09-18-2014, 05:57 AM
Senior Member
 
Hanberg's Avatar
 
Join Date: Feb 2009
Posts: 283
Mentioned: 2 Post(s)
Quoted: 14 Post(s)
I did the, almost, same couple days ago. Only I bought a second scale (on sale 16USD) and put it on both at the same time.
Did the weighing twice and got 1kg difference, so the scales arent THAT precise.

As to the weight distribution (Ive just asked this question on another topic - what is the f/r bias on a standard SP1?)

Your difference is less that 2kg - thats less than 1kg front and rear out of little more than 100kg - so little less than 1% - which if you weight multiple times might change around.

Why the rear is heavier than the front? In your case it's not much - but remember behind the engine you also got the tail, massive swingarm, wider rim, begger wheel, chain, exhausts, compared to in front the forks and smaller wheel and rim.

You got 50,5% rear and 49,5% front - its pretty damn close.
Ive got 49,9% rear and 50,1% front - still pretty damn close.

http://www.facebook.com/HondaSP1 - my little build :-)
Hanberg is offline  
post #6 of 15 (permalink) Old 09-18-2014, 06:51 AM Thread Starter
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Lowering the triples on the front shifts the weight forward. Don't know how much cause I didn't scale the bike when I was adjusting the triple height.
However the bike steers much worse if I lower the triple two lines lower that where it is now.
Makes me think if having a front shifted weight is actually better or not.

With the weight distribution I have now, I totally "feel" the bike when it leans and my steering feels quite "light".
Maybe I haven't learn to lean as I should and this "wrong" setting (rear shifted weight) fits my "wrong" way of riding......

I have a lot of experiments to complete if I want to have a solid answer to any of those questions.

Hanberg, thank you very much for sharing your numbers....helps a lot buddy


My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
post #7 of 15 (permalink) Old 09-18-2014, 06:58 AM
Senior Member
 
Hanberg's Avatar
 
Join Date: Feb 2009
Posts: 283
Mentioned: 2 Post(s)
Quoted: 14 Post(s)
Your welcome.

In your first setup, with the bike supported by a strap, this will take weight of the wheels. I dont know how much your bike was supported by it, but considering you felt it was safe with only one strap, I would guess some.
You need to balance it, maybe have a friend balance it while you watch the scales.
You can test this by putting a bottle of water on a kitchen scale, weigh it, and then weight it again leaning against something.

Also, people talk about lowering the front as putting more weight on the front.
This is right in theory, but we are talking miniscule amounts, and the much more drastic change in geometry will completely cover the change in weight.
What you feel is change in geometry, not weight change.

http://www.facebook.com/HondaSP1 - my little build :-)
Hanberg is offline  
post #8 of 15 (permalink) Old 09-18-2014, 07:04 AM
Senior Member
 
Hanberg's Avatar
 
Join Date: Feb 2009
Posts: 283
Mentioned: 2 Post(s)
Quoted: 14 Post(s)
If you want to play around with the weight distribution, you would need to move heavy stuff around - relocate battery to the front is an obvious example to put weight forward.
Or move the entire bikes weight relative to the wheels, but now we are talking rake and different swingarm and big $$$ not to mention the geometry will also change dramatically.

http://www.facebook.com/HondaSP1 - my little build :-)
Hanberg is offline  
post #9 of 15 (permalink) Old 09-18-2014, 12:01 PM
Senior Member
 
Join Date: Jun 2013
Location: Glasgow, Scotland
Posts: 162
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Hanberg View Post
I did the, almost, same couple days ago. Only I bought a second scale (on sale 16USD) and put it on both at the same time.
Did the weighing twice and got 1kg difference, so the scales arent THAT precise.
You might find the 2nd time you loaded it up on the scales you hit the brake a bit harder than the first time loading the front/rear suspension differently, that's where I'd say the 1kg swing could be.
weegaz22 is offline  
post #10 of 15 (permalink) Old 09-18-2014, 01:54 PM Thread Starter
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Quote:
Originally Posted by Hanberg View Post
In your first setup, with the bike supported by a strap, this will take weight of the wheels. I dont know how much your bike was supported by it, but considering you felt it was safe with only one strap, I would guess some.
You need to balance it, maybe have a friend balance it while you watch the scales.
You can test this by putting a bottle of water on a kitchen scale, weigh it, and then weight it again leaning against something.
I've made sure this wasn't the case. The belt didn't push or pull the bike at all. The way you see it in the picture was barely standing upright, in a way that if I push it very lightly on the left side with just one finger, the bike would lean over towards the belt and fell over.
That's why I said "it was tricky with the scale" cause it took me a while to balance it and I didn't have the time I needed to take a picture of the scale's number. The scale was already shut off. Balancing the bike at a precise upright position is very tricky.

Quote:
Originally Posted by Hanberg View Post
Also, people talk about lowering the front as putting more weight on the front.
This is right in theory, but we are talking minuscule amounts, and the much more drastic change in geometry will completely cover the change in weight.
What you feel is change in geometry, not weight change.
I am aware of those improvements, but the whole experiment, started under the assumption that the RC51 is pure breed superbike. By definition that means that it is a more forward weight distributed balanced bike than others.
And that is what surprises me the most


My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda RC51 Forum : RC51 Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome