V85 Speedometer inaccuracy

[jacksonracingcomau]

Dash consumption ?

The third variable that the distance measurement gets used for in ecu
Spped = distance / time
Odo = distance
Consumption = distance / fuel used ( or vice versa depending on language)

All 3 were different on Gonzo’s Honda
If v85 has range remaining figure, this too will change
Gonzo called this number ecu distance

[Huzo]

[pedantic mode]

That would be "pair of compasses".

[/pedantic mode]

Hmm...
You’d think so Mark, but when I got home and unwrapped it, the pivot had come out and half of it was missing.
So I used a dinner plate and a saucer..

[Huzo]

Don't turn "Pedantic mode" off yet!

What did you pour over the calculations?   Hope it didn't stain them too bad.

NOW

[/pedantic mode] off

Lannis

Got me you bugger...!
I love that sort of stuff, even when I’m the victim..
Suffice to say though Lannis if I’m as successful as I hope to be, goodness knows what fluids will be spontaneously produced as a by product of my unbridled excitement.
I’m not as well calibrated as I hope my tone wheel ends up..

[Huzo]

[pedantic mode]

That would be "pair of compasses".

[/pedantic mode]

Now Mark..
Wasn’t it you that pointed out to me that the meaning of pedantic was (among other things), to present an ostentatious display of knowlege ?

[Huzo]

Don't turn "Pedantic mode" off yet!

What did you pour over the calculations?   Hope it didn't stain them too bad.

NOW

[/pedantic mode] off

Lannis

Also that’d be “too badly”.

[Huzo]

The third variable that the distance measurement gets used for in ecu
Spped = distance / time
Odo = distance
Consumption = distance / fuel used ( or vice versa depending on language)

All 3 were different on Gonzo’s Honda
If v85 has range remaining figure, this too will change
Gonzo called this number ecu distance

At 100 kph, the distance to empty+the current trip distance, occasionally added up to 500 k’s.
But generally about 470 k’s.
It won’t be as good as my Norge..(nothing is), but it’ll be close.

[beetle]

Wasn’t it you that pointed out to me that the meaning of pedantic was (among other things), to present an ostentatious display of knowlege ?

Sounds like something I'd do. After all, I am ostentatiously knowledgeable.

[Huzo]

Sounds like something I'd do. After all, I am ostentatiously knowledgeable.

That’s true Mark.
You’re the smartest fish in your pool.

[Huzo]

Here’s a shot of the panel on the ‘85


The trip distance+distance to empty usually come close to 500 k’s.
Depending on speeds, reliably around 480.
So not a bad range really.

[Knuckle Dragger]

I'd be extremely surprised if either Speedo or Odo worked on the pulse differential betwixt fore & aft.

Yes, for Traction/Wheelie Control & ABS absolutely;  these are all a function of pulse rate differential, but speed & distance related calculations are solely a rear wheel pulse rate function I'd surmise.

[Huzo]

I'd be extremely surprised if either Speedo or Odo worked on the pulse differential betwixt fore & aft.

Yes, for Traction/Wheelie Control & ABS absolutely;  these are all a function of pulse rate differential, but speed & distance related calculations are solely a rear wheel pulse rate function I'd surmise.

I put the bike on the centrestand and spun the rear wheel by hand.
The speedo read, but not when I spun the front wheel.

[GonzoB]

I put the bike on the centrestand and spun the rear wheel by hand.
The speedo read, but not when I spun the front wheel.

So, are you sure the speedo pulses are coming from the ABS discs? The reason I ask is that my previous ride (Honda CTX700) had ABS on the Australian models, but not on some other models, so the speedo pulses came from a gearbox sensor (otherwise the non-ABS models wouldn't have a speedo). Is there a cable coming out of the gearbox?

Gonzo

[Huzo]

So, are you sure the speedo pulses are coming from the ABS discs? The reason I ask is that my previous ride (Honda CTX700) had ABS on the Australian models, but not on some other models, so the speedo pulses came from a gearbox sensor (otherwise the non-ABS models wouldn't have a speedo). Is there a cable coming out of the gearbox?

Gonzo

Bloody hell Gonzo, you’ve got a point there..
No I’m not as sure as I was since you mention it. I’ll take the sensor off and test it again, I only presumed as much and could very easily be wrong.
You may have saved me from a huge waste of time...
Thank you.

[GonzoB]

Bloody hell Gonzo, you’ve got a point there..
No I’m not as sure as I was since you mention it. I’ll take the sensor off and test it again, I only presumed as much and could very easily be wrong.
You may have saved me from a huge waste of time...
Thank you.

Well, beetle did say in reply no.7 that the data typically came from the ABS, but since it's a new model, I assume no-one has the wiring diagrams yet??

Gonzo

[Zoom Zoom]

Huzo, didn't you already make a ring? (Just not the desired amount of correction?) Since it did make a change, it would be safe to assume your idea can be pursued.

Further, I'm not aware of any offering of the V85 that comes without ABS so it would be unlikely that there is another sensor somewhere. To qualify, I don't know this for certain. Just using logic.

John Henry

[Huzo]

Well, beetle did say in reply no.7 that the data typically came from the ABS, but since it's a new model, I assume no-one has the wiring diagrams yet??

Gonzo

Yep.
Read that..

[Huzo]

Huzo, didn't you already make a ring? (Just not the desired amount of correction?) Since it did make a change, it would be safe to assume your idea can be pursued.

Further, I'm not aware of any offering of the V85 that comes without ABS so it would be unlikely that there is another sensor somewhere. To qualify, I don't know this for certain. Just using logic.

John Henry

No not yet.
I have been working out the tooling and process for the machining. It’s the milling of the slots that held me up.
I don’t have any aspect of the procedure now, that I have not got a plan for.
I’m currently in Northern NSW and will be home tomorrow night. I’ll begin the setting up on Thursday.
Watch this space..

[beetle]

Is there a cable coming out of the gearbox?

There is not.

I assume no-one has the wiring diagrams yet??

You assume incorrectly.





The speed signal comes from the ABS unit, and is sent to the ECU. There are no sensors other than those on the wheels. There are no non-ABS models.

[Huzo]

There is not.
The speed signal comes from the ABS unit, and is sent to the ECU. There are no sensors other than those on the wheels. There are no non-ABS models.

You beauty..

[Huzo]

Would these suffice ?

[Huzo]

#79 on the 7SM seems to have a fair bit to say regarding vehicle speed..

[GonzoB]

There is not.

You assume incorrectly.

The speed signal comes from the ABS unit, and is sent to the ECU. There are no sensors other than those on the wheels. There are no non-ABS models.

Gee, there's lots of good info on this forum. Thanks.

Now we await the results of the machining....

Gonzo

[Huzo]

I’m currently in Northern NSW and will be home tomorrow night. I’ll begin the setting up on Thursday.

No I bloody well won’t.
I have to go to Adelaide in the morning...BUGGER..!

[Pizza Guzzi]

I hope your truck has decent aircon !

[Huzo]

I hope your truck has decent aircon !

Yep, it has .
Leaving for Adelaide now, 45 deg there...
The bunk cooler is good too..

[LowRyter]

Here’s a shot of the panel on the ‘85


The trip distance+distance to empty usually come close to 500 k’s.
Depending on speeds, reliably around 480.
So not a bad range really.

The dash was one thing I didn't care for riding this bike.

[Huzo]

The dash was one thing I didn't care for riding this bike.

If I’d had my way I’d have preferred standard clocks too.
As long is it all stays working I’ll not be too upset though.

[LowRyter]

If I’d had my way I’d have preferred standard clocks too.
As long is it all stays working I’ll not be too upset though.

Funny, my Ducati has a monographic screen.  I was enthused about it but upon first ride, I liked it immediately.  It works well, intuitive and has lots of capability and information and it's not distracting.   The Owner's Manual is 300 pages of which 170 are dedicated to operating dashboard.

[GonzoB]

My previous ride had a digital speedo, and I found I was concerned with getting it to read correctly. My current 12-y-o Breva has an analogue speedo, and I haven't bothered checking its accuracy because it doesn't worry me in the same way.

The analogue one is approximately correct, but the digital one was exactly wrong!

Gonzo

[Huzo]

The analogue one is approximately correct, but the digital one was exactly wrong!

Gonzo

There are two major reasons that I’m doing this and you have nailed one of them.