2017 V7III speedometer problem

[ssrealty]

My 2017 Moto Guzzi V7III odometer is showing wrong speed readout. For some reason, the odometer needle starts below the zero MPH readout mark. Instead the read needle rests about half an inch below where it should be. Hence when riding, the gauge is showing incorrect speed. Km/hr repsents closer actual mph speed.

Below is a video link:

https://youtu.be/nDZat8vIp1s






I also uploaded two pictures. One is a video picture showing needle resting at zero MPH. Other picture is my bike showing needle much lower.

Anyone had this problem? I have over 9500 mi on bike. This is the first problem I have had.

[Dirk_S]

That’s how you know you have one of an original Guzzi machines, not some knockoff whose speedos actually work.

Someone will be along shortly to actually be of help, I’m sure.

[Kiwi_Roy]

Its almost like the needle has slipped on the shaft it dosen't go all the way to the top either, these clocks are stepper motors, they don't have a spring like we are used to.
Is the bike still under warrantee?
Perhaps try turning the key off while it's still doing its initial test. Do all the other functions of the speedo seem normal?

[twowheeladdict]

So, did this just happen all of a sudden?

Did you make any changes to the bike just before this occurred?

I haven't investigated the electrical system of these bikes, but I recall reading that the sweep during initial start up had something to do with calibration. 

If it were my bike the first thing I would do is disconnect the battery,  put the black and red leads together, turn on the ignition to make sure the electrical system is fully discharged, and then reconnect the battery and turn on the ignition to see if anything changed. 

[Bert Remington]

I concur with KR.  The needle has shifted on the stepper motor shaft.  Confirmation is the needle doesn't go to 130 on Key-On initialization sweep.  There is no mechanical stop on the dial face.

[twowheeladdict]

I concur with KR.  The needle has shifted on the stepper motor shaft.  Confirmation is the needle doesn't go to 130 on Key-On initialization sweep.  There is no mechanical stop on the dial face.

The real question would be HOW did the needle shift on the stepper motor shaft?  Doesn't sound as likely is the stepper motor went out of calibration.  A glitch caused the information in non-volatile memory to become corrupted?

[Bert Remington]

Vibration most likely.  I had an early BMW K100 whose speedometer needle came off during high RPM but went back on, albeit unknown to me about 10mph low.  For several years I wondered why I was passing traffic while going the speed limit.  I managed to avoid the CHP until they caught me using radar on a two-lane road.  I was going to contest the citation but first went to a speedometer calibration shop and was quite surprised.  I gave up riding motorcycles for several decades.  I'd be talking to the CHP again if I kept the Norge but it's my nephew's problem now.  And the track Mustang I gave to my niece?  She got a come-to-court ticket within a month.

[Huzo]

I concur with KR.  The needle has shifted on the stepper motor shaft.  Confirmation is the needle doesn't go to 130 on Key-On initialization sweep.  There is no mechanical stop on the dial face.

Touche’..

[ssrealty]

It is out of warranty. I think this happened one other time. But it was temporary.

I did disconnect the negative battery cable and have reset ignition multiple times. It makes sense if there is a mechanical problem with the needle setting incorrectly.  This gap is consistent with the needle showing a lower speed on odometer. The Km/hr mark seems closer to the actual mph.

I will be dropping off at AF1 next week. Bike has over 9,600 mi. This is the only problem I have ever had. I also have a trickle charger on bike. Have made no modifications to bike.

[Bert Remington]

ssrealty -- if your speedometer turns out to be faulty and can't be replaced under warranty, Hamlin, a top quality MG specialist, is offering a lightly used one: https://www.ebay.com/itm/2017-2020-Moto-Guzzi-V7III-Speedometer-MPH-2D000306/114621818617?hash=item1aaffe26f9:g:QrcAAOSwUMdf-f1E

[twowheeladdict]

ssrealty -- if your speedometer turns out to be faulty and can't be replaced under warranty, Hamlin, a top quality MG specialist, is offering a lightly used one: https://www.ebay.com/itm/2017-2020-Moto-Guzzi-V7III-Speedometer-MPH-2D000306/114621818617?hash=item1aaffe26f9:g:QrcAAOSwUMdf-f1E

At that price I would be tempted to pull apart the existing Speedometer myself and see what is going on.  I would probably live with the offset and learn where the speeds now are based on y GPS.    

Or get the multimedia device and App that shows speed and tach on the smartphone and just ignore the speedo. 

[chrisfer]

You can see here, same type of offset on the tachometer, some pics of dismantling : https://www.forumguzzi.fr/viewtopic.php?f=8&t=7643
Same opening as here : https://www.youtube.com/watch?v=zLl3P4o_DTk&feature=emb_logo

[Huzo]

Bore a hole in the side and bend the needle.

[Bert Remington]

Merci pour le félicitage

I think jemase said it was easy.

[ssrealty]

Watched the video. Seems like all you have to do is remove the needle and reset at zero mark?

[twowheeladdict]

Watched the video. Seems like all you have to do is remove the needle and reset at zero mark?

Can't hurt to try.

[Wayne Orwig]

If it is a stepper motor model, it is likely going past the zero stop for some reason.
Most stepper models have no way of knowing where they are on the sweep. So at power on, they sweep up and down until they run against the stop. If it doesn't stop for some reason, it will go below zero and the the speed will be offset.
So you may need to find the zero stop, and fix it. If the needle is a little loose, maybe it is missing the stop.

[Kiwi_Roy]

I liken the setup to a printer where the drive motors across until it comes to an optical stop, as Wayne says it doesn't really know where it is until it hits a stop then it counts up or back from that point.
I believe the stops are soft stops not a hard mechanical limit like a steering stop, part of the motor, if the pointer is in the wrong place it has no way of knowing that's why it does it's little dance whenever it's turned on, to find out where it is.
I'm sure if you were to open it up and pull the pointer off you could put it back on the right zero point.
This video posted by Chrisfer shows opening up the bezel, bend it out in tiny steps so you don't end up breaking the glass.
https://www.forumguzzi.fr/viewtopic.php?f=8&t=7643
Be prepared to power it up with the bezel off so it can find true zero.

BTW I compared the action of yours to my V7III, its exactly the same (except for your offset) starts out a little below zero, wraps around to full scale then back to zero.

[Bert Remington]

ssrealty needs to position the needle as shown in his 'odometer 2' photo.  And then verify correct Key-On sweep with the face off just in case the stepper wasn't in its zero resting position.

EDIT: search "speedometer stepper motor" on Amazon to better understand what's involved.

[ssrealty]

Just wanted to give update on my speedometer.

It was replaced by AF1. I was hoping it would be covered under warranty. But bike is 2017 and almost four years old. Repair cost just over $600. It is working. Took several weeks for part to come is. Does it always take weeks for Moto Guzzi to send parts? Never experienced this order delay with my Ducatis.

[egschade]

Just wanted to give update on my speedometer.

It was replaced by AF1. I was hoping it would be covered under warranty. But bike is 2017 and almost four years old. Repair cost just over $600. It is working. Took several weeks for part to come is. Does it always take weeks for Moto Guzzi to send parts? Never experienced this order delay with my Ducatis.

I've been told that - is wreaking havoc in that part of Italy and almost all business is delayed if not stopped. My MG panniers are scheduled to SHIP almost a month after they were ordered. No idea when they'll actually arrive stateside.

[Bert Remington]

ssrealty -- did AF1 repair the original speedometer keeping the odometer setting or did they replace it with a new one with a 0 miles odometer setting?  If they repaired it, do you know what part was needed?  Thanks.

[AaronH]

ssrealty,

I had the speedometer on my 2018 Special replaced under warranty due to broken mounting bosses... it took a couple weeks to arrive.  When the tach was replaced for the same reason, it took six months for the warranty replacement to arrive.  Both failed well before -.  I regularly buy filters, gaskets, fasteners, etc from my dealer, and those are always in stock or arrive within days.  I think six months is a fluke, but two weeks is somewhat normal.

I had the speedometer replaced under warranty on my 2008 Super Duke back in 2009, and it took about two weeks for that part to arrive also. 

Did they program your odometer?  On my V7III, the odometer was at zero on the replacement, so it shows 8,000 miles less than what are on it.  When KTM replaced my speedometer/tach assembly, they asked what I thought I'd have in two weeks, and I said 1400 miles.  I got to the dealer with a mile to go, so I rode around the block, and the new odometer was programmed correctly to the mile. 

[ssrealty]

ssrealty -- did AF1 repair the original speedometer keeping the odometer setting or did they replace it with a new one with a 0 miles odometer setting?  If they repaired it, do you know what part was needed?  Thanks.

AF1 did NOT repair the speedometer. It was replaced. 1 hour labor plus parts. I think they sold the part cheaper than retail based on circumstances. I have the old speedometer in box.


Odometer reading is correct. I just assumed the computer reset odometer. Odometer was NOT reset to zero. It had correct meeting.


Just did a Twisted Sisters ride this week. Now have over 10,000 mi. on odometer.

[KonaDoc]

Interesting. My 2017 Stone just started doing this a couple of weeks ago. Consistently reads 8mph low.

Guess I'll have to learn to live with it.

doc

[CORDE]

Hi

As i also posted in the other discussion regarding speedometer niddle, I had the same problem in my v7 Stone III and after reading all i was already prepared to disassemble the console but i was worried about losing its tightness so i tried first just hitting. (not proud of saying that when i have a master degree in Mechanical Engineering)
I found that hits in the appropiate position and strength were moving the niddle back to the zero and it stays. I did it with the console still mounted on the bike without removing any screw or part. In my case were hitting in the right side no very strong just with the soft part of the palm of my hand.  So far i have driven a couple of times and the problem did´t come again. I´ll keep you posted if it comes back out of the range.

Good luck

[CORDE]

Here again,

Hitting the gauge i can make the needle set to Zero, but after one ride or two, it moves again out of range.
I have dissaembled it and im thinking on putting some glue inside the needle attachement. I think the problem is that it slides inside the axis.
I ll let you know if it works.

:(

[DoubleGuzzi]

I envisage a possible similar situation with my speedo, sometime soon. Beyond an indicated 70mph, the needle vibrates rapidly by just a small amount but it is immediately obvious. That can't do the stickiness of the needle to the shaft much good!