Speedometer error - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 43 (permalink) Old 05-23-2014, 01:39 AM Thread Starter
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Cool Speedometer error

My 2014 Canadian FJR has approx. 10 percent error on the high side. When it shows 100 km It is actually doing 90 km per hour. Is this normal with all including bikes that shoe in mph? I have checked it with a gps and also with a friendly police officer. Is it possible to calibrate these units. Any help would be appreciated. Not going as fast as I thought!:
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post #2 of 43 (permalink) Old 05-23-2014, 01:57 AM
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Same here, %10 error on my AEE, indicated 100 kmh = 90 kmh.
Haven't checked out the odometer yet.
I suppose you notice the error more with a digital display.

Maybe Yamaha could plug their computer in and adjust it, lol lol lol not !

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post #3 of 43 (permalink) Old 05-23-2014, 02:01 AM
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That is not normal, at least for the US models. My bike has a bit over 2% error. Speedo indicated 82 MPH is 80 MPH on my GPS. 60 MPH on the speedo is 59 MPH on the GPS. I've talked with other 2013-14 FJR owners and this seems to be the norm.

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post #4 of 43 (permalink) Old 05-23-2014, 02:03 AM
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For some reason the non-US models have a greater error. Mine and other Gen 3s I've heard from are only off about 2mph at an indicated 70, that's about a 2.8% error.

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post #5 of 43 (permalink) Old 05-23-2014, 04:51 AM
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All 3 of my Gen2 bikes, and my present Gen3 bike, over read by about 8%. I didn't have a GPS when I owned Gen1 bikes, so I don't know what error they had. I find the error very annoying.
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post #6 of 43 (permalink) Old 05-23-2014, 05:46 AM
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Providing the error is reading high, I don't see a problem, you are not going to get a ticket for speeding and in fact gives you a little space to be slightly over the limit (on your speedo) if flashed and still be within the speed limit. The actual speed I'm travelling at is largely irrelevant to me, I ride at a speed I'm happy with, don't need a device to tell me I'm going too fast.
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post #7 of 43 (permalink) Old 05-23-2014, 06:32 AM
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I find that when I read the speedo, I then estimate what my true speed is, and I can't stop myself doing it. It's distracting, I like things to work correctly. When I've got my glasses on, I just use the GPS speed, But the numbers are too small with my glasses off. It's a bastid getting old and grumpy.
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post #8 of 43 (permalink) Old 05-23-2014, 07:07 AM
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And add to that Bernie, zero tolerance now in Queensland.
Absolutely crazy, spend more time looking at the speedo than the road.
The police here now using lazer digital speed cameras in unmarked cars.

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post #9 of 43 (permalink) Old 05-23-2014, 08:44 AM
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My GenII is about 7% over. But knowing that I just run it faster now.

You can get a speedohealer if it makes you happy, will also make sure your mileage is correct. With it reading high, you're also racking up more miles on the odometer.

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post #10 of 43 (permalink) Old 05-23-2014, 09:08 AM
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We Don't Have It So Bad

A BMW Service Bulletin on How to Set Speedometers

Service Bulletin

Page 1 of 1

Date: January 2002

Bulletin No: 62 001 02 (003)

BMW Motorcycles

Revised Information - Permissible Speedo Advance, All Models.
With the general availability of Global Positioning Systems (GPS) as well as other electronic navigational aids for motorcycle applications, the presence of speedometer advance in BMW motorcycles may once again be questioned. Whether the GPS is purchased through BMW Motorcycles or through an aftermarket source, the presence of speedometer advance in BMW speedometers and the reason for the advance, remain. Please emphasize the ““Important Note”” detailed below with your customers,

The original equipment speedometer, as supplied with your BMW motorcycle, is the only instrument to be used in judging the motor- cycles speed relative to all legal and posted speed limits.

Speedometer advance is necessary to compensate for the negative tol- erances in tire sizes between tire manufacturers, electric speedometer indication, and other factors. This advance reduces the risk of the speedometer displaying a speed that is less than the vehicle’’s actual speed. The maximum amount of speedometer advance is 10% of the vehicle’’s actual speed plus 2.4 mph.

Actual speed=55 mph 55 x 10% = 5.5mph; 5.5 mph + 2.4 mph = 7.9 mph.

Permissible displayed speed is from 55 to 62.5 mph.

The displayed speed must never be less than the actual speed. No repairs or replacement should be attempted if the speedometer advance is within 10% plus 2.4 mph.

The presence of a speedometer advance in no way affects the mileage limitations of the 3 yr/36,000 mile Limited Warranty, or the frequency of the service intervals as recommended by BMW Motorcycles. These limitations and intervals are gauged soley by the mileage indicated on the motorcycle’’s

Service and Technical Manager
(201) 307 4261 [email protected]
© 2002, BMW of North America, LLC

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