'06 speedo error

[sliick2]

Friends does any body know if there is a way to correct this error-possibly a calibration ,done @ the

dealer ? Might be a good chance to have them correct the instant mileage problem that seems to be

cropping up.The mileage thing is not any big deal for me-but if your there-why not have that fixed as well ?

That mileage thing might take awhile for Mother to deal with. Sliick2 <_<

 

[Fred H.]

I have a Yellow Box by Black Robotics on my Wing that electronically dials in a correction factor. I assume the speedo on the FJR is electronic and not mechanical driven. If it is, there is no reason why one of these boxes couldn't be wired into it.

It also would fix the pessimestic MPG calculation and the Odometer error that the speedo error induces.

I have some photos of this device on my site if you want to look at it.

https://www.pbase.com/fredharmon/yellowbox

Black Robotics site is here:

https://www.blackrobotics.com/

There are also some other brands on the market that essentially work the same way. All they do is modify the pulses from the speedo sensor.

 

[SkooterG]

In my experience, speedo error and odometer error are totally independent. Not saying that is the case on the FJR, but that would have to be verified.

 

[Fred H.]

I haven't checked the FJR yet, but I can tell you my GL1800 had a 4% speedo error and a 4.5% odometer error. Which results in folks thinking they get better gas mileage than they actually do.

The odometer normally works off the same input signal that drives the speedo, so the error seems to be in both.

I will check into it and post what I find. It is easy enough to verify with a GPS.

 

[temp357]

In my experience, speedo error and odometer error are totally independent. Not saying that is the case on the FJR, but that would have to be verified.

ok,

i'll bite. I can seee how you would check the speedo error with the gps....but how exactly does one go about verifying the odometer error? :glare:

 

[twowheelnut]

Simple. Any measured highway will do to check the odo...

 

[Fred H.]

Y'all are gonna make me go out and get some more bugs on my bike again, aren't you.

A GPS can not only measure speed but also distance, and quite acuratly I might add. All you do is reset the trip odometer on the bike and the trip meter on the GPS and go for a ride, and then compare the two after you get done.

 

[SkooterG]

In my experience, speedo error and odometer error are totally independent. Not saying that is the case on the FJR, but that would have to be verified.

ok,

i'll bite. I can seee how you would check the speedo error with the gps....but how exactly does one go about verifying the odometer error? :glare:

Two ways. Gerbil lover gave one, and with GPS would be the second. After travelling X distance, simply compare what distance the GPS has said you have travelled, to the distance the odometer has said you travelled. Then calculate the percentage of error.

Y'all are gonna make me go out and get some more bugs on my bike again, aren't you.

Looks like it. I know, a tough price to pay in the quest for knowledge young grasshopper.

 

[Ignacio]

Then there's the "Skooter" method. Ask Skooter how many penis lengths he rode. Then multipy that figure by 0.5 and you have the actual distance.

Example: "I was hauling ass to Tucson doing about a buck-20. I covered that 5280 penis lengths in 30 seconds....because my wang is exactly a foot long. Don't even get me started about the girth. We're talking tuna can."

Translation: "I exagerate my length and it was exactly a half mile in 30 seconds. I was the stiffest I've ever been because of the two Viagra I popped and was totally surprised it was 6 inches long. Cars were passing me so I must have been doing 60 mph."

.....now put that on the math portion of the SAT.

 

[twowheelnut]

Two ways. Gerbil lover gave one, and with GPS would be the second. After travelling X distance, simply compare what distance the GPS has said you have travelled, to the distance the odometer has said you travelled. Then calculate the percentage of error.

Meet the Gerbil twins, Yvette and Yvonne:

:****:

 

[SkooterG]

Two ways. Gerbil lover gave one, and with GPS would be the second. After travelling X distance, simply compare what distance the GPS has said you have travelled, to the distance the odometer has said you travelled. Then calculate the percentage of error.

Meet the Gerbil twins, Yvette and Yvonne:

:****:

You do have an active imagination, don't you?

What about your gerbils named radman and RadioHowie? :haha:

:jester:

 

[RTSR1/FJR]

Two ways. Gerbil lover gave one, and with GPS would be the second. After travelling X distance, simply compare what distance the GPS has said you have travelled, to the distance the odometer has said you travelled. Then calculate the percentage of error.

Meet the Gerbil twins, Yvette and Yvonne:

:****:

You do have an active imagination, don't you?

What about your gerbils named radman and RadioHowie? :haha:

:jester:

I have a SpeedoHealer on my R1. With -1 tooth on the front, I had to adjust by -12.7%. Stock I believe was around 6%. This little devise is the ****! It's also plug & play! Check it out:

https://www.speedohealer.com/eng/intro.htm

 

[chickey191]

one thing that has always puzzled me -

on most bikes I have installed a cyclometer - [bicycle computer].

To get accurate speedo readings I have very carefully calibrated it using tire circumferance as a starting point and GPS over multiple runs - to dial it in.

speedo - totall based on tire size and revolutions per minute (or second).

So - when I set my gps to zero - and the bike and cyclometer to zero - and I travel a known distance -- why don't they agree with each other.

Nope - not doing wheelies - so that is out

Nope - I install on front tire - so tire spin is out

typically am riding relatively straight so it isn't like I'm weaving all over the road adding a tad of over the road distance to my crow fly distance.

I can understand map mileage difference - you can do this easily by cutting corners and riding the inside all the time.

I can understand the triagulation difference - say riding in the mountains - where gps sees linear mileage not road mileage - but these have been on relatively straight and relatively flat roads.

I know that gps is EXACTLY accurate - it isn't reading your position every nanosecond - it isn't exactly on point (stand still and you can sometimes see yourself moving at 1 mph) - but the differences can be significant.

what gives?

 

[SkooterG]

what gives?

Chuck, unless I am reading your question wrong, I think the answer is simple.

Vehicle (any vehicle) odometers are simply not 100% accurate, even right from the factory with all tire sizes as they should be.

Mine have generally not been off by much - usually 1.5-2.5%, but there have been a few exceptions.

Now, on the FJR, you do realize that speedometer and odometer inputs are coming from rear wheel, or more precisely, somewhere in the driveline, and not the front wheel, like in the old days?

You have dialed in you cyclometer to be pretty darn accurate. Typical stock odometers are not. Close, but not quite.

 

[chickey191]

that isn't my point -

cycle speedo is dead accurate with gps

why isn't cycleometer ODO similarly as close to the gps?

 

[Fred H.]

Ok here are the results as measured on a straight highway at around 75mph.

Odometer-----GPS

5.1------------5.0

10.2-----------10.0

13.6-----------13.3

20.5-----------20.0

25.6-----------25.0

30.7-----------30.0

33.2-----------32.4

41.0-----------40.0

So the odometer error is about 2.5% fast. And the speedometer is about 5.5% fast on my bike. This means your gas mileage numbers are all off by the same 2.5%. I will probably put a Yellow Box correction device on it and set it at 4%.

Y'all just had to make me get more bugs on it. You guys owe me a free bike wash.

 

[SkooterG]

that isn't my point - cycle speedo is dead accurate with gps

why isn't cycleometer ODO similarly as close to the gps?

Ahhhhhhh.............so I didn't understand the first post. Silly me.

Now that's a good question.

Are you sure they are mismatched? In other words, are the *percentage* of error for each similar, or way off too?

Perhaps the GPS isn't as accurate as we think? It's better at calculating speeds, than exact locations and distances? That doesn't make much sense to me, but I suppose it's possible. The cyclometer is using a simple Distance divided by Time = Speed forumula, so it should be dead accurate. Perhaps it's clock function to measure time is not accurate? So while it's distance is accurate, it's speed indication is not?

Without some definite standard to compare any of these to, it's hard to tell.

 

[twowheelnut]

You do have an active imagination, don't you?
What about your gerbils named radman and RadioHowie? :haha:

:jester:

Man, you're just lookin' to be the meat in the radman/radiohowie sandwich, aren't you?! Be careful, radman carries jalopenos...

As for the accuracy of civilian GPS systems... They are only as accurate as the Military, who controls the satellites that feed 'em, deems adequate at the time and or area. If you don't believe me, ride by a nuclear facility or strategic installation or any other 'high value target' and watch how they go all flooey.

Now, put down that sheep and go read a book or sumpin'. :****:

 

[temp357]

Now, my new bike hasn't arrived yet, but maybe you guys are riding your tires to the bone? Get some knobbies and i bet you'll see better results! :clapping: