Speedo Recalibration ?

So I changed the gearing on the 92 VFR (love it -1/+2) over the winter, unfortunately my speedo is now reading about 10-12% too high (I will verify with GPS, but I know it�s high). Do you know any companies that make the gearbox to �gear down� the speedo cable? Everything out there is electronic and mine is old skool.




thx

It can all be done in the computer, well atleast in honda cars. Should be able to in the motos as well.

not to sure you having an early 90's thou

If you have a mechanical cable drive speedo off the front wheel, you're hooped. (unless you take it to a speedo repair shop that can recal it internally)



If it's electronic, off the countershaft sprocket, then a Yellow Box will fix it.


http://www.blackrobotics.com/

Does your speedo cable come off the front wheel? If so, it shouldn't change anything?

Speedohealer is another brand of electronic recalibration box.

[image: View Post]veefer800canuck, on Jul 31 2008, 08:38 PM, said:

If you have a mechanical cable drive speedo off the front wheel, you're hooped. (unless you take it to a speedo repair shop that can recal it internally)



If it's electronic, off the countershaft sprocket, then a Yellow Box will fix it.


http://www.blackrobotics.com/


Interesting product, Veef. But after following the link and checking out the .pdf's on installation (3 pages) and calibration (2 pages)...what a giant PITA to set up! You gotta' splice and solder the thing into your speed sensor circuit, then locate the box somewhere away from heat and electrical interference, preferably under the seat where my PCIII and rudimentary tools also reside. I can barely latch the seat now. :ohmy: If only it was a device you could just plug in between the speedo and speed sensor harness...ah, I'd probably sign up, and park the box inside the fairing somewhere. Guess my speedo will continue to indicate "fast forward" after a +1 front sprocket change until the Yellow Box gets more installation-friendly. Cool concept, though, I just don't tinker as much as a lot of posters on this forum.

[image: View Post]dendron, on Jul 31 2008, 07:45 PM, said:

[image: View Post]veefer800canuck, on Jul 31 2008, 08:38 PM, said:

If you have a mechanical cable drive speedo off the front wheel, you're hooped. (unless you take it to a speedo repair shop that can recal it internally)



If it's electronic, off the countershaft sprocket, then a Yellow Box will fix it.


http://www.blackrobotics.com/


Interesting product, Veef. But after following the link and checking out the .pdf's on installation (3 pages) and calibration (2 pages)...what a giant PITA to set up! You gotta' splice and solder the thing into your speed sensor circuit, then locate the box somewhere away from heat and electrical interference, preferably under the seat where my PCIII and rudimentary tools also reside. I can barely latch the seat now. :ohmy: If only it was a device you could just plug in between the speedo and speed sensor harness...ah, I'd probably sign up, and park the box inside the fairing somewhere. Guess my speedo will continue to indicate "fast forward" after a +1 front sprocket change until the Yellow Box gets more installation-friendly. Cool concept, though, I just don't tinker as much as a lot of posters on this forum.

If I remember right, my speadohealer didn't require ANYTHING other than unplugging something and plugging the speadohealer in between the two plug ends... then you calibrate the speadohealer and you're done. It installs under the seat in and took maybe 10 minutes total.

Someone tell me why gearing down a bike with a manual speedo cable has affected the speedometer reading?? I mean, if your gearing change was to the REAR wheel, and the speedometer takes its reading off the FRONT wheel.....

[image: View Post]edg, on Jul 31 2008, 10:28 PM, said:

[image: View Post]dendron, on Jul 31 2008, 07:45 PM, said:

[image: View Post]veefer800canuck, on Jul 31 2008, 08:38 PM, said:

If you have a mechanical cable drive speedo off the front wheel, you're hooped. (unless you take it to a speedo repair shop that can recal it internally)



If it's electronic, off the countershaft sprocket, then a Yellow Box will fix it.


http://www.blackrobotics.com/


Interesting product, Veef. But after following the link and checking out the .pdf's on installation (3 pages) and calibration (2 pages)...what a giant PITA to set up! You gotta' splice and solder the thing into your speed sensor circuit, then locate the box somewhere away from heat and electrical interference, preferably under the seat where my PCIII and rudimentary tools also reside. I can barely latch the seat now. :ohmy: If only it was a device you could just plug in between the speedo and speed sensor harness...ah, I'd probably sign up, and park the box inside the fairing somewhere. Guess my speedo will continue to indicate "fast forward" after a +1 front sprocket change until the Yellow Box gets more installation-friendly. Cool concept, though, I just don't tinker as much as a lot of posters on this forum.

If I remember right, my speadohealer didn't require ANYTHING other than unplugging something and plugging the speadohealer in between the two plug ends... then you calibrate the speadohealer and you're done. It installs under the seat in and took maybe 10 minutes total.

Wow, Edg, what speedohealer was that? I don't think it was the Yellow Box, right?

thanks for the comments. to clarify:

the speedo is mechanical - so no electronic measures will work
the speedo does not run off the front wheel, it runs off the drive sprocket so changing sprocket size front and rear (or tire size for that matter) has an impact on speedo rate.

I guess I gotta go internal... or live with it.

Are you sure it doesn't run to a speed sensor from the CS sprocket?

To overcome this, but I do not pay much attention to speed anyway, I have installed a simple bike comupter, it even adds some features not known to older bikes like ours.
Like this, it goes up to 300km/h

http://jizdni-kola.o...sigma-mc8-moto/

Sorry, just checked the fiche, and I see you are right about it being all mechanical.

[image: View Post]dendron, on Aug 1 2008, 12:18 AM, said:

[image: View Post]edg, on Jul 31 2008, 10:28 PM, said:

[image: View Post]dendron, on Jul 31 2008, 07:45 PM, said:

[image: View Post]veefer800canuck, on Jul 31 2008, 08:38 PM, said:

If you have a mechanical cable drive speedo off the front wheel, you're hooped. (unless you take it to a speedo repair shop that can recal it internally)



If it's electronic, off the countershaft sprocket, then a Yellow Box will fix it.


http://www.blackrobotics.com/


Interesting product, Veef. But after following the link and checking out the .pdf's on installation (3 pages) and calibration (2 pages)...what a giant PITA to set up! You gotta' splice and solder the thing into your speed sensor circuit, then locate the box somewhere away from heat and electrical interference, preferably under the seat where my PCIII and rudimentary tools also reside. I can barely latch the seat now. :ohmy: If only it was a device you could just plug in between the speedo and speed sensor harness...ah, I'd probably sign up, and park the box inside the fairing somewhere. Guess my speedo will continue to indicate "fast forward" after a +1 front sprocket change until the Yellow Box gets more installation-friendly. Cool concept, though, I just don't tinker as much as a lot of posters on this forum.

If I remember right, my speadohealer didn't require ANYTHING other than unplugging something and plugging the speadohealer in between the two plug ends... then you calibrate the speadohealer and you're done. It installs under the seat in and took maybe 10 minutes total.

Wow, Edg, what speedohealer was that? I don't think it was the Yellow Box, right?


Thanks for the Speedohealer mention, Edg. A Google search returned that with a capital "S." That appears to be the call. No splicing, no soldering, just plug their box in between the speed sensor harness and the speedo itself, then calibrate. Whew, I can park my wire splicers and soldering gun, and just plug 'n play, so to speak. Nice touch! Here's the link to the 6th gen fix in pictures... This appears to be a bit more sophisticated fix -- on the surface -- than the Yellow Box solution.

<http://www.speedohealer.com/your_pics/vfr800_05/tutorial.htm>

I think he meant that he had an '02 VFR rather than a '92 VFR....right?

[image: View Post]dendron, on Aug 2 2008, 12:22 AM, said:

[image: View Post]dendron, on Aug 1 2008, 12:18 AM, said:

[image: View Post]edg, on Jul 31 2008, 10:28 PM, said:

[image: View Post]dendron, on Jul 31 2008, 07:45 PM, said:

[image: View Post]veefer800canuck, on Jul 31 2008, 08:38 PM, said:

If you have a mechanical cable drive speedo off the front wheel, you're hooped. (unless you take it to a speedo repair shop that can recal it internally)



If it's electronic, off the countershaft sprocket, then a Yellow Box will fix it.


http://www.blackrobotics.com/


Interesting product, Veef. But after following the link and checking out the .pdf's on installation (3 pages) and calibration (2 pages)...what a giant PITA to set up! You gotta' splice and solder the thing into your speed sensor circuit, then locate the box somewhere away from heat and electrical interference, preferably under the seat where my PCIII and rudimentary tools also reside. I can barely latch the seat now. :ohmy: If only it was a device you could just plug in between the speedo and speed sensor harness...ah, I'd probably sign up, and park the box inside the fairing somewhere. Guess my speedo will continue to indicate "fast forward" after a +1 front sprocket change until the Yellow Box gets more installation-friendly. Cool concept, though, I just don't tinker as much as a lot of posters on this forum.

If I remember right, my speadohealer didn't require ANYTHING other than unplugging something and plugging the speadohealer in between the two plug ends... then you calibrate the speadohealer and you're done. It installs under the seat in and took maybe 10 minutes total.

Wow, Edg, what speedohealer was that? I don't think it was the Yellow Box, right?


Thanks for the Speedohealer mention, Edg. A Google search returned that with a capital "S." That appears to be the call. No splicing, no soldering, just plug their box in between the speed sensor harness and the speedo itself, then calibrate. Whew, I can park my wire splicers and soldering gun, and just plug 'n play, so to speak. Nice touch! Here's the link to the 6th gen fix in pictures... This appears to be a bit more sophisticated fix -- on the surface -- than the Yellow Box solution.

<http://www.speedohealer.com/your_pics/vfr800_05/tutorial.htm>

no, I have a 1992 not an 02. please read the OP.

I found a guy that does classic speedo rebuilds who can calibrate it.

thanks to all of you for trying.

[image: View Post]betarace, on Aug 2 2008, 09:05 AM, said:

no, I have a 1992 not an 02. please read the OP.

I found a guy that does classic speedo rebuilds who can calibrate it.

thanks to all of you for trying.


Got it. Glad you found your solution. And, thanks for posting the initial thread that also led to a cableless electronic solution for us later generations. WIN-WIN! :beer: