Speedometer off 20kph
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Intermediate
Joined: Sep 2010
Posts: 29
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Speedometer off 20kph
Had this bike for a couple of years and speedometer is showing 120kph when I'm doing 100kph according to GPS. Would this be the speed sensor needing to be cleaned/replaced?
2009 FLHTCU
2009 FLHTCU
Road Master
Joined: Dec 2009
Posts: 843
Likes: 43
From: Louisiana
I'm not familiar with a sensor causing an error. That's a huge error. If you have a good Harley dealer I'd discuss it with them. Notice I said discuss. I wouldn't let them start throwing parts at it unless they can actually correct the problem and you only pay for the bad part. The shot gun method will be costly. I've had 3 touring Twin Cams and the worst was about 3% fast at 70 on my GPS.
Road Warrior
Joined: Nov 2014
Posts: 1,962
Likes: 140
From: NY
Thats not uncommon, I also have an 09 flhtcu that when the speedo's at 60mph the bikes actually doing 56mph per gps and local police portable radar trailer.
Once you know your speedo's amount of error its easy to deal with & not worth going after to correct IMHO unless someone & or dealer knows an easy procedure to recalibrate it since you already know how far its off.
If not that you could also install a SPEEDO-HEALER thats an aftermarket programable electronic unit you hook inline with the speedo to correct any error it may have.
Scott
Last edited by wscott; Jul 19, 2015 at 08:59 PM.
Road Master
Joined: Dec 2009
Posts: 843
Likes: 43
From: Louisiana
==================
Thats not uncommon, I also have an 09 flhtcu that when the speedo's at 60mph the bikes actually doing 56mph per gps and local police portable radar trailer.
Once you know your speedo's amount of error its easy to deal with & not worth going after to correct IMHO unless someone & or dealer knows an easy procedure to recalibrate it since you already know how far its off.
If not that you could also install a SPEEDO-HEALER thats an aftermarket programable electronic unit you hook inline with the speedo to correct any error it may have.
Scott
Thats not uncommon, I also have an 09 flhtcu that when the speedo's at 60mph the bikes actually doing 56mph per gps and local police portable radar trailer.
Once you know your speedo's amount of error its easy to deal with & not worth going after to correct IMHO unless someone & or dealer knows an easy procedure to recalibrate it since you already know how far its off.
If not that you could also install a SPEEDO-HEALER thats an aftermarket programable electronic unit you hook inline with the speedo to correct any error it may have.
Scott
Seasoned HDF Member
Joined: Apr 2012
Posts: 9,982
Likes: 5,220
From: Michigan
The obvious question here is do you have the same size tires as those that came on this bike new?
My bike has 20,550+ miles on it and my speedometer reads about 1-2MPH more than my GPS reads at 70MPH.
My bike has 20,550+ miles on it and my speedometer reads about 1-2MPH more than my GPS reads at 70MPH.
Road Master
Joined: Apr 2015
Posts: 1,013
Likes: 32
From: Elk Grove, California
Buy one of these. Plug and play and you can adjust it yourself.
http://pages.ebay.com/motors/link/?n...599127&alt=web
http://pages.ebay.com/motors/link/?n...599127&alt=web
Road Master
Joined: Mar 2013
Posts: 1,151
Likes: 14
From: Seattle
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Intermediate
Joined: Sep 2010
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I realize there is aftermarket ways of correcting it, but wonder why it's off so much in the first place and what part needs replacing. I'll talk to the dealership and see if it's a simple flash to fix. I usually try to avoid the dealership.
From Dakota digital website on their speed corrector
2007 and later Harley models require hardwiring into stock harness, speed correction can be made up to Harley's factory margin of error, typically 3-5% from the actual speed reading. If correction is made beyond this, it may result in the loss of the 6th gear indicator light and cruise control.
From Dakota digital website on their speed corrector
2007 and later Harley models require hardwiring into stock harness, speed correction can be made up to Harley's factory margin of error, typically 3-5% from the actual speed reading. If correction is made beyond this, it may result in the loss of the 6th gear indicator light and cruise control.
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5th Gear
Joined: Sep 2013
Posts: 9
Likes: 0
From: Difficult, TN
My bike was originally off by 2 mph faster than actual speed. I had a Thunder Max installed and now I am able to fix the problem and now I am dead on.
Last edited by RetDetSergeant; Jul 28, 2015 at 04:18 PM.
