Gen 4: 2011-2015 So I Made a "Speedo Healer" for Gen 4, Gen 5 - Kawasaki ZX-10R.net
 5Likes
  • 1 Post By lenshead
  • 2 Post By lenshead
  • 1 Post By lenshead
  • 1 Post By lenshead
 
LinkBack Thread Tools Display Modes
post #1 of 9 Old 02-11-2018, 01:04 PM Thread Starter
WSB Rider
 
lenshead's Avatar
 
Join Date: May 2005
Location: Kissimmee, FL
Posts: 772
Posting Frequency
Images: 2
 
So I Made a "Speedo Healer" for Gen 4, Gen 5

I just had this part made for me!

I've measured a speedo error of about 4% on my Avons with 4000 miles on them. This sensor wheel should lower speedo readings by exactly 4%.

My goal is to be accurate at any speed +/-1mph up to 100mph. I'll report back with test results.

I don't have ABS and my traction control is always off, but i don't anticipate any hiccups. I guess I'll find out!
Attached Thumbnails
Click image for larger version

Name:	20180211_130137.jpg
Views:	17
Size:	1.61 MB
ID:	412234  
SkyDork likes this.

Thou Shalt Respect Thy 10, And Revel In It's Power, For It Is Good, And Plentiful.
lenshead is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 02-11-2018, 01:15 PM
WSB Rider
 
Join Date: Nov 2015
Location: uk
Posts: 675
Posting Frequency
 
Quote:
Originally Posted by lenshead View Post
I just had this part made for me!

I've measured a speedo error of about 4% on my Avons with 4000 miles on them. This sensor wheel should lower speedo readings by exactly 4%.

My goal is to be accurate at any speed +/-1mph up to 100mph. I'll report back with test results.

I don't have ABS and my traction control is always off, but i don't anticipate any hiccups. I guess I'll find out!
Is this for the rear wheel?
I noticed when i fitted a bsb rear slick that my speedo was reading lower than usual.
I wondered how this affected the traction because the front tyre is basically standard size so maybe it calculates each rotation and compensates for tyre size differences
ukzx10r is offline  
post #3 of 9 Old 02-11-2018, 01:51 PM Thread Starter
WSB Rider
 
lenshead's Avatar
 
Join Date: May 2005
Location: Kissimmee, FL
Posts: 772
Posting Frequency
Images: 2
 
It is to replace the rear wheel sensor. Tire circumference changes between brands/models as well as over the life of any given tire. Even turning uses a part of the tire that has a smaller radius. The CPU does not need the wheels to turn at exactly the same speed to do traction control. It think it's based more on sudden changes in actual rear wheel speed that is not paralleled on the front, for example.

Thou Shalt Respect Thy 10, And Revel In It's Power, For It Is Good, And Plentiful.
lenshead is offline  
 
post #4 of 9 Old 02-11-2018, 07:44 PM Thread Starter
WSB Rider
 
lenshead's Avatar
 
Join Date: May 2005
Location: Kissimmee, FL
Posts: 772
Posting Frequency
Images: 2
 
OK!

So I currently have a speedo error of 0.092% !!


This was obtained by setting my speedo to KPH (a finer scale than MPH) and using a GPS app that logs peak speed to the first decimal. Three runs averaged.

Of course, this is coincidental, since, at the current state of tire wear, the uncorrected error fell right at about 4%, the exact correction factor of the new sensor.
This error will change as the tire continues to wear and again as it get's replaced. But I'm confident I can trust my speedometer now!

I have a second prototype, and I'll be seeking a volunteer to test it? Maybe someone who rides more aggressively than I do and can see if it affects ABS or TC?
SkyDork and lun471k like this.

Thou Shalt Respect Thy 10, And Revel In It's Power, For It Is Good, And Plentiful.
lenshead is offline  
post #5 of 9 Old 02-12-2018, 09:52 AM
REPOST Enforcement Mod
 
SkyDork's Avatar
 
Join Date: Feb 2006
Location: Wesley Chapel, FL (The Dub-C)
Posts: 13,125
Posting Frequency
           
Garage
I remember this topic from a long time ago. What I can't remember is if it was you who originally posted the idea of doing this or not lenshead.

Either way, this is the most viable solution to getting an accurate speed input. But questions do arise that I'm interested in. Nice job on the disk. My concern with that would apply to the TC and ABS systems. If they aren't matched up, the system can cause errors. At the very least it can be more restrictive when it senses a larger speed difference sooner than normal. That's irrelevant if you ride with it off all the time like both of us do, but anyone else copying this might see some weird behaviors.

The other thing is how are you getting that error with GPS? I know how, but I wanted to point out something about that testing on it. Using max speed readings is problematic. GPS speed is as accurate as radar....over steady-state speeds only. Accelerations do not allow enough time to record an accurate speed at all times. If you don't know, the GPS signal is basically only an atomic clock time signal. So the app receiving the time needs to do it quick enough to be able to see a difference in times between locations, which determines the speed of the receiver. There's usually a pretty decent delay in that when accelerating. So I'm just curious if you've done any steady-state testing with it to see if that accuracy is accurate.

I may not be perfect, but at least I don't ride a Suzuki.

Ridding the Internet of bad grammar, 1 post at a time.
#WordCrimes




SkyDork is online now  
post #6 of 9 Old 02-12-2018, 10:46 AM
WSB Rider
 
Join Date: Nov 2015
Location: uk
Posts: 675
Posting Frequency
 
Has this got more holes or less holes?
ukzx10r is offline  
post #7 of 9 Old 02-12-2018, 11:37 AM Thread Starter
WSB Rider
 
lenshead's Avatar
 
Join Date: May 2005
Location: Kissimmee, FL
Posts: 772
Posting Frequency
Images: 2
 
It has 48 holes down 2 from the stock parts 50. As far as measurements go they were taken at a steady speed maintained for about 3 seconds. Results were very reputable. I know the number sounds made up but that really is the result I got!
lun471k likes this.

Thou Shalt Respect Thy 10, And Revel In It's Power, For It Is Good, And Plentiful.
lenshead is offline  
post #8 of 9 Old 02-12-2018, 01:26 PM
Track Day Rider
 
lun471k's Avatar
 
Join Date: May 2016
Location: Quebec, Canada
Posts: 105
Posting Frequency
 
Garage
Really curious about this (it's interesting) ! If you find someone who wants to try it out with ABS and KTRC I'd really like to see the results.
lun471k is offline  
post #9 of 9 Old 02-12-2018, 02:44 PM Thread Starter
WSB Rider
 
lenshead's Avatar
 
Join Date: May 2005
Location: Kissimmee, FL
Posts: 772
Posting Frequency
Images: 2
 
Quote:
Originally Posted by lenshead View Post
Results were very reputable.
Repeatable! Dammit talk to text!
ukzx10r likes this.

Thou Shalt Respect Thy 10, And Revel In It's Power, For It Is Good, And Plentiful.
lenshead is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki ZX-10R.net 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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