speedometer error correction

[pdksh]

good afternoon all, just an observation. I just completed a 5000KM road trip and made extensive use of my Garmin GPS (dont get me started on that piece of junk) and the one thing I immediately noticed was my speedometer was 10KM/hr slow at 100KMs. I used both my phone GPS/speed app and my garmin GPS and they two GPS apps reported the same speed, where the bike's Speedometer consistently reported slower. It looks like the speedometer of the bike is accurate at approximately 45KM/hr, anything over that and it reports slow.
A couple of weeks ago while traveling on the Highway (before I did my trip) I was doing 135KM/hr to keep with the flow of traffic (100km zone that everyone typically does 120km, I live in Ontario ) I wasn't comfortable loosing my license doing 35km/hr over the posted limit, turns out I was probably doing between 120km/hr - 125km/hr.

Has anyone else with a GEN-II Tenere taken the time to "test" the accuracy of their speedometer. Its all "digital" so there rely no excuse for this level of error. Funny enough, my unofficial distance tests using highway signs appeared to be spot on with distances of approximately 100kms.

I averaged about 4.6 Liters per 100 KM fuel economy doing approximately 100kms/hr fully loaded with a weeks camping gear.

I tried to change my speedometer read out from KMs to Miles for a short jog into the USA but I couldn't find such an option in the menu system. It possibly doesn't exist and I was too lazy too check the owners manual.

Just Curious.

Brian

 

[bimota]

i know the gen 1 bikes are way out to

rob

 

[OldRider]

I put on a Speedo Healer and dialed it in so it reads exactly same as the GPS.

 

[Boris]

i know the gen 1 bikes are way out to

rob

Yep, my gen1 reads incorrectly, but the other way to the OP. It reads optimistic, showing about 70mph with the GPS only showing about 63/4mph. This occurs on both my TomTom and Garmin.

MPH to KPH is certainly possible on a UK Gen1 bike, presume it’s there on a Gen2 as well, but perhaps different on the Canadian market.

 

[Kyle_E]

Manufacturers are allowed a 10% variance (in the US anyway probably the same everywhere to some degree)

My gen1 is "accurate" (1-2mph off) to 30mph. Then its off a varying amount, up to about 70mph its 5mph slower than indicated. After 70mph its off about 7 mph 100mph actual is 107 indicated.

I thought the gen 2's were pretty much accurate?

Like @OldRider said you can buy a spedo healer, for around $100 and dial it in.

 

[WJBertrand]

My gen II speedometer reads about 1-1.5 MPH faster than my GPS and phone.


Sent from my iPhone using Tapatalk Pro

 

[bimota]

Yep, my gen1 reads incorrectly, but the other way to the OP. It reads optimistic, showing about 70mph with the GPS only showing about 63/4mph. This occurs on both my TomTom and Garmin.

MPH to KPH is certainly possible on a UK Gen1 bike, presume it’s there on a Gen2 as well, but perhaps different on the Canadian market.

yep mine the same the other way

rob

 

[pvwheeler]

good afternoon all, just an observation. I just completed a 5000KM road trip and made extensive use of my Garmin GPS (dont get me started on that piece of junk) and the one thing I immediately noticed was my speedometer was 10KM/hr slow at 100KMs. I used both my phone GPS/speed app and my garmin GPS and they two GPS apps reported the same speed, where the bike's Speedometer consistently reported slower. It looks like the speedometer of the bike is accurate at approximately 45KM/hr, anything over that and it reports slow.
A couple of weeks ago while traveling on the Highway (before I did my trip) I was doing 135KM/hr to keep with the flow of traffic (100km zone that everyone typically does 120km, I live in Ontario ) I wasn't comfortable loosing my license doing 35km/hr over the posted limit, turns out I was probably doing between 120km/hr - 125km/hr.

Has anyone else with a GEN-II Tenere taken the time to "test" the accuracy of their speedometer. Its all "digital" so there rely no excuse for this level of error. Funny enough, my unofficial distance tests using highway signs appeared to be spot on with distances of approximately 100kms.

I averaged about 4.6 Liters per 100 KM fuel economy doing approximately 100kms/hr fully loaded with a weeks camping gear.

I tried to change my speedometer read out from KMs to Miles for a short jog into the USA but I couldn't find such an option in the menu system. It possibly doesn't exist and I was too lazy too check the owners manual.

Just Curious.

Brian

My 16 Canadian version is exactly the same as yours speedo wise. I dont think our version can switch between mph/kph for some stupid reason.

 

[Cycledude]

good afternoon all, just an observation. I just completed a 5000KM road trip and made extensive use of my Garmin GPS (dont get me started on that piece of junk) and the one thing I immediately noticed was my speedometer was 10KM/hr slow at 100KMs. I used both my phone GPS/speed app and my garmin GPS and they two GPS apps reported the same speed, where the bike's Speedometer consistently reported slower. It looks like the speedometer of the bike is accurate at approximately 45KM/hr, anything over that and it reports slow.
A couple of weeks ago while traveling on the Highway (before I did my trip) I was doing 135KM/hr to keep with the flow of traffic (100km zone that everyone typically does 120km, I live in Ontario ) I wasn't comfortable loosing my license doing 35km/hr over the posted limit, turns out I was probably doing between 120km/hr - 125km/hr.

Has anyone else with a GEN-II Tenere taken the time to "test" the accuracy of their speedometer. Its all "digital" so there rely no excuse for this level of error. Funny enough, my unofficial distance tests using highway signs appeared to be spot on with distances of approximately 100kms.

I averaged about 4.6 Liters per 100 KM fuel economy doing approximately 100kms/hr fully loaded with a weeks camping gear.

I tried to change my speedometer read out from KMs to Miles for a short jog into the USA but I couldn't find such an option in the menu system. It possibly doesn't exist and I was too lazy too check the owners manual.

Just Curious.

Brian

Maybe I’m miss understanding you, Are you saying your Tenere speedometer reads slower than your GPS ? That would be very unusual, perhaps someone already installed a Speedo Healler and has it calibrated wrong ?
The speedometer on my 2013 usually read 5-6 mph faster than gps, the speedometer on my 2018 usually reads 1-2 mph faster than gps.
Are you perhaps using a rear tire that is taller than a stock rear Tenere tire ? That could definitely effect your speedometer reading.

 

[AZMike]

I guess I will take the GPS tomorrow and just see how far off my land speed records are...

 

[sector7g]

My '18 Tenere and a previous '17 FJR are/were both off, under by about 4-5mph around 70. Going by the GPS, I'm showing 71, the bikes showing 76 or thereabouts. Same with my VW car. Stock rims and wheels. Is what it is...

 

[Zuan]

My gen 1 was off by about 7-8% at 100 kph. My gen 2 is off by about 4-5% at 100 kph. I installed a Speed-O-Healer on my gen 1 and dialed it in to be an exact match to my gps speed. When I did the same on my gen 2, it messed up the gear indicator if I put in more than 3% correction. Probably has something to do with the software algorithm which calculates the gear based on rpm and velocity.

 

[Eville Rich]

My 2016 reads two mph fast at highway speeds. Seems to be consistently that much regardless of speed, but there probably some rounding going on that masks a constant percent difference. I can live with that.

My wife's Tiger 800 reads about 10 percent fast. Explained why she was worried about how fast we were going when she first got it. Now she knows I'm a responsible rider that carefully follows all posted speed limits. Ha!

My WR250R read about 10 percent fast until I put a speedo healer on it. Now it matches the gps, but the odometer reads 10 percent fewer miles travelled (they share a sensor). At first I thought my gas mileage and range had dropped suddenly. Then the dim candle in my head figured it out.

I'm not sure if the S10 speedometer shares a sensor with the odometer, but if they do, a speedo healer will change your odometer readout. Just something to keep in mind.

Eville Rich

 

[mrjake]

My 2020 model read 8% higher. They are legally aloud to 10% but still its unacceptable hehe. Do anyone recommend a certain model of speedo healer and a nice easy to follow how to video?

 

[WJBertrand]

Though speedos and odos commonly share the same sensor, the government accuracy requirement for odos is much tighter. That means the total change for the odo will be smaller for the same percentage correction.

My old ST1300 had a 7% speedometer error but only a 2% odometer error.

Having said that, I’m very surprised to hear of an OEM speedometer that reads too slow. Someone over corrected it, or non-OEM sized tires are installed?

 

[sheikyerbooty]

yep my stock '21 reads about 5% high. Same as my 2012 mitsubishi ute and other vehicles I've had. Do manufacturers do this on purpose to slow us down? seems pretty consistent across a range of modern vehicles to be a coincidence?

 

[WJBertrand]

yep my stock '21 reads about 5% high. Same as my 2012 mitsubishi ute and other vehicles I've had. Do manufacturers do this on purpose to slow us down? seems pretty consistent across a range of modern vehicles to be a coincidence?

Yes it’s deliberate. Marketing likes you to think your vehicle is faster than it really is and legal doesn’t want to be sitting in court for an accident that might have been caused because the driver/rider thought he was going slower than he really was. Also, I think if a slow speedometer caused enough customers to get speeding tickets, there’d be grounds for a class action suit.


Sent from my iPhone using Tapatalk Pro

 

[Checkswrecks]

LOTS of older threads about this. Bottom line as mentioned is that Gen1 bikes showed 8% fast and Gen2 are fairly accurate but it depends on the tire and how worn the tire is. With my current Avons I'm reliably about 1.5-2 mph fast.

And to comply with the NHTSA legal mandate, vehicles can NOT show slower than they are going. Add to that the manufacturers need to be able to use various tires so the +1.5 to 2 mph is intentional.

 

[AZMike]

Just got back from a Friday morning jaunt. 2013 Gen 1 speedo reading 116mph, GPS says 108. About 7 percent error. Vrtually new shoes front and rear.

 

[AusTexS10]

good afternoon all, just an observation. I just completed a 5000KM road trip and made extensive use of my Garmin GPS (dont get me started on that piece of junk) and the one thing I immediately noticed was my speedometer was 10KM/hr slow at 100KMs. I used both my phone GPS/speed app and my garmin GPS and they two GPS apps reported the same speed, where the bike's Speedometer consistently reported slower. It looks like the speedometer of the bike is accurate at approximately 45KM/hr, anything over that and it reports slow.
A couple of weeks ago while traveling on the Highway (before I did my trip) I was doing 135KM/hr to keep with the flow of traffic (100km zone that everyone typically does 120km, I live in Ontario ) I wasn't comfortable loosing my license doing 35km/hr over the posted limit, turns out I was probably doing between 120km/hr - 125km/hr.

Has anyone else with a GEN-II Tenere taken the time to "test" the accuracy of their speedometer. Its all "digital" so there rely no excuse for this level of error. Funny enough, my unofficial distance tests using highway signs appeared to be spot on with distances of approximately 100kms.

I averaged about 4.6 Liters per 100 KM fuel economy doing approximately 100kms/hr fully loaded with a weeks camping gear.

I tried to change my speedometer read out from KMs to Miles for a short jog into the USA but I couldn't find such an option in the menu system. It possibly doesn't exist and I was too lazy too check the owners manual.

Just Curious.

Brian

My Gen 1 reads about 10% above reality throughout, My Gen 1 will change from km/h to mph by holding down the odometer button until it shifts, as I recall, but your dash is more complicated and menu driven, but I think there is a "Units" select button in the menu where you make the transition.