Author Topic: Inaccurate speedo, V7 III (Read 4410 times)

Thirtyaughtsix · « **on:** July 20, 2019, 06:46:53 PM »

Does anyone else have a conservative speedo on their v7 III? When compared to Waze (gps based directions app) it's always 4-5 mph conservative to how fast Waze is telling me I am going, which has always been dead on compared to every 4 wheeled vehicle I've driven so far. I've known about this since I've had the bike, didn't take long to know something was up when I was commuting on the interstate going "5" over and was still having literally everyone blow by me.

That said, is there anything on my end I can do to fix this? Has this happened to anyone else? Could my dealer help me out here? Could this be covered under the warranty?

i will note I've added some rubber washers between the mounting piece and triple tree, it hasn't helped.

Kiwi_Roy · « **Reply #1 on:** July 21, 2019, 12:51:45 AM »

My V7iii reads 10% high when compared to a GPS, I suspect the manufacturers do that on purpose, there's really no reason why a digital speedo should be wrong.

Noguzznoglory · « **Reply #2 on:** July 21, 2019, 06:50:21 AM »

This may help

https://www.rideapart.com/articles/357241/weekend-wtf-motorcycle-speedometer-wrong/

rocker59 · « **Reply #3 on:** July 21, 2019, 07:38:19 AM »

Up to 10% high is common on Euro motorcycles.

Laws in Europe allow for, so the error is built into the instruments. Been that way for 25 + years

yogidozer · « **Reply #4 on:** July 21, 2019, 07:40:34 AM »

Once you know how far off it is, does it matter?

Thirtyaughtsix · « **Reply #5 on:** July 21, 2019, 08:01:21 AM »

Quote from: yogidozer on July 21, 2019, 07:40:34 AM

Once you know how far off it is, does it matter?

I mean yeah kinda, on my 850T sure whatever but on a 2019 model? I don't see any reason on earth europe couldn't have figured this out by now, it's inexcusable if I'm being frank.

On the other hand, there is comfort in knowing every bike that's ever come out of europe ever is afflicted with this and not just mine, and I'm not bothered enough to go about fixing it, even if I could. Not worth the price of a gps unit in my opinion

LowRyter · « **Reply #6 on:** July 21, 2019, 08:04:33 AM »

5% as written in my Ducati Owner's Manual. Bikes are typically 5-10% optimistic, unless it's a cop bike.

yogidozer · « **Reply #7 on:** July 21, 2019, 08:08:04 AM »

Maybe it's just me, I don't spend a lot of time looking at the speedo, unless I see flashing lights in my mirror

Then I say, but officer, my darn speedo is off

sign216 · « **Reply #8 on:** July 21, 2019, 08:38:34 AM »

My speedo on the '09 V7 is 5 mph optimistic too. That's the least of my worries.

elvisboy77 · « **Reply #9 on:** July 21, 2019, 10:54:42 AM »

Widely known and generally accepted that speedometers on Guzzis are not accurate.

beard · « **Reply #10 on:** July 21, 2019, 11:33:40 AM »

I checked the files and found the place to correct the speedo like in 5AM.
The new XDFs are online. Look at 'Scalars' when you load it in TunerPro.

With this scalar you can adjust the value.

Default is 1535

Vagrant · « **Reply #11 on:** July 21, 2019, 03:59:44 PM »

when my 3 says 60 MPH it' 57 on a garmin. if the above correction is possible it would be great.

antmanbee · « **Reply #12 on:** July 21, 2019, 04:27:02 PM »

Quote from: beard on July 21, 2019, 11:33:40 AM

I checked the files and found the place to correct the speedo like in 5AM.
The new XDFs are online. Look at 'Scalars' when you load it in TunerPro.

With this scalar you can adjust the value.

Default is 1535

I adjusted mine today on my Griso. Read post 17.
https://wildguzzi.com/forum/index.php?topic=100576.0

gerryp · « **Reply #13 on:** July 21, 2019, 04:34:42 PM »

Quote from: Thirtyaughtsix on July 20, 2019, 06:46:53 PM

Does anyone else have a conservative speedo on their v7 III? When compared to Waze (gps based directions app) it's always 4-5 mph conservative to how fast Waze is telling me I am going, which has always been dead on compared to every 4 wheeled vehicle I've driven so far. I've known about this since I've had the bike, didn't take long to know something was up when I was commuting on the interstate going "5" over and was still having literally everyone blow by me.

That said, is there anything on my end I can do to fix this? Has this happened to anyone else? Could my dealer help me out here? Could this be covered under the warranty?

i will note I've added some rubber washers between the mounting piece and triple tree, it hasn't helped.

My speedo on my '15 V7 Stone reads 4 mph low compared to my garmin GPS.

Gerry

Diploman · « **Reply #14 on:** July 21, 2019, 07:02:11 PM »

Since the dawn of the machines we call motorcycles, the speed-reading instruments attached to them have been famously - notoriously - inaccurate. Riders have been living with their hugely approximate speed readouts for decades. This is just a fact of moto life to which most are reconciled.

If, however, a rider might want a meaningfully accurate speedo, there is a solution: A GPS speedometer, such as those offered by Speedhut. Precise, accurate speed readout, unaffected by changes in wheel diameter (ie, tire changes), no drive cables (just an antenna and power wires), lightweight and very simple to install. The speedo's information panel includes odometer, trip meter and a variety of other functions. A model is offered that has a built-in digital tachometer. Speedhut's GPS speedos come in several stock sizes to match the diameter of OEM speedos, so making the switch is largely a plug-and-play affair. On request, Speedhut will apply waterproofing to the bezel.

For those who just can't live with optimistic/pessimistic, off-the-mark OEM speedos, this is the answer. Not only will your bike at last reliably display a spot-on accurate speed reading, but the odometer reading - another imprecise weak point of OEM speedos - will reflect the same degree of exactitude. No further reason to whine....

https://www.speedhut.com/gauge/GR338-GPS-01/1/GPS-Speedometer-120

MMRanch · « **Reply #15 on:** July 21, 2019, 11:03:30 PM »

On my 2016 V-7II Stone , the speedometer was off about 10% . I say "WAS" , those factory rear tires (130/80-17) might have been a good deal from the MG company's point of view , but from my point of view ... 5,500 from a rear tire is not very well.

The new 130/90-17 tire made the speedometer only 1 or 2 % low compared to the GPS , and the AM26 rear already has over 7,000 miles on it and it has 1/3 of the tread left on it. I'm expecting to get about 11,000 miles from it before the wear bars rise to the outside layer .

I don't use the rear tire for dropping speed the rear does a sorry job of slowing the bike down anyway , that's the chore of the front tire 99% of the time ,. And still the rear Sport Demon only lasted 5,500 mile to the wear bars.

antmanbee · « **Reply #16 on:** July 22, 2019, 06:01:41 AM »

Quote from: Diploman on July 21, 2019, 07:02:11 PM

If, however, a rider might want a meaningfully accurate speedo, there is a solution: A GPS speedometer, such as those offered by Speedhut. Precise, accurate speed readout, unaffected by changes in wheel diameter (ie, tire changes), no drive cables (just an antenna and power wires), lightweight and very simple to install. The speedo's information panel includes odometer, trip meter and a variety of other functions. A model is offered that has a built-in digital tachometer. Speedhut's GPS speedos come in several stock sizes to match the diameter of OEM speedos, so making the switch is largely a plug-and-play affair. On request, Speedhut will apply waterproofing to the bezel.

For those who just can't live with optimistic/pessimistic, off-the-mark OEM speedos, this is the answer. Not only will your bike at last reliably display a spot-on accurate speed reading, but the odometer reading - another imprecise weak point of OEM speedos - will reflect the same degree of exactitude. No further reason to whine....

https://www.speedhut.com/gauge/GR338-GPS-01/1/GPS-Speedometer-120

For older bikes with mechanical gauges this is a viable option.
For newer bikes with a electronic dash that is an integral part of the ECU system it will most likely not work.
It is a no cost easy fix to set it accurately with Tunerpro and GuzziDiag / IAWDiag and Tools.
https://www.von-der-salierburg.de/download/GuzziDiag/

twowheeladdict · « **Reply #17 on:** July 22, 2019, 07:50:39 AM »

Quote from: Thirtyaughtsix on July 21, 2019, 08:01:21 AM

I mean yeah kinda, on my 850T sure whatever but on a 2019 model? I don't see any reason on earth europe couldn't have figured this out by now, it's inexcusable if I'm being frank.

On the other hand, there is comfort in knowing every bike that's ever come out of europe ever is afflicted with this and not just mine, and I'm not bothered enough to go about fixing it, even if I could. Not worth the price of a gps unit in my opinion

Every motorcycle I have owned that I have been able to compare with a GPS has been up to 10% off, with the only exception being Harley. I have owned all four Japanese, Royal Enfield, Triumph, and Moto Guzzi.

On chain drive bikes some people change sprockets to get closer in accuracy. A different diameter rear tire will change the speedo on the V7. A Speedo Healer is used by some.

I don’t worry about it. I ride at what speed is comfortable for me based on the riding conditions

pauldaytona · « **Reply #18 on:** July 22, 2019, 03:48:24 PM »

Since tyre circumference varies, it can't be exact. And by law it should be in the 5-10% area for that, and that people never can tell: officer I was doing 60, and now you tell me I was over it.

News:

Author Topic: Inaccurate speedo, V7 III (Read 4410 times)

elvisboy77

beard