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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#1  Unread postPosted: December 6th, 2017, 5:10 pm

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Location: Athens
Local time: December 13th, 2017, 8:39 am
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My Rides: 1986 GL1200A Aspencade

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So I noticed my speedometer is waaay off when compared to my GPS. Like 6-7 mph off at highway speeds. I remember my other 80's rides were always "optimistic", but not that far off! Is there anything that can be done about that, other than math... or putting a tractor tire up front?


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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#2  Unread postPosted: December 7th, 2017, 5:21 am

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It could be that things are getting dried out in the drive unit. It may be time to pull the cable and oil everything up and see it that makes an improvement.

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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#3  Unread postPosted: December 7th, 2017, 7:59 am

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I think there isn’t much can be done to correct it since the mechanical workings in the speedo over time fatigue and wear. Used to be a a corrector could be placed inline on the cable but that was for tire size correction. Only other thing I can think of is Check that you have the correct size OEM tire.

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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#4  Unread postPosted: December 7th, 2017, 8:15 am

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What about odometer reading?
If it is also off, then it must be the tire size difference.
Otherwise, weakened spring as Dan says.

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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#5  Unread postPosted: December 7th, 2017, 10:13 am

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"Way off" how? Too fast, or too slow? :headscratch:

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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#6  Unread postPosted: December 7th, 2017, 1:49 pm

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On the Aspy models this is electronics. Hall effect switch in the speedo hub, signal to the digital speedo dash. The amount the speedo is off isn't that far, if that was at 60. If it's like mine it'll be showing 60 but checked against mile makers and time the speed will be below that. With that said I think mine changes based on the amount of queertrons that are running loose. I say this because every time I've checked it I'll get a different speed, might be a bit low or almost exact. I guess if I used gps I'd know for sure. The speed variation also varies with the speed you're running. These observations are my $0.02 worth.

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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#7  Unread postPosted: December 7th, 2017, 3:25 pm

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Joined: November 5th, 2017, 6:01 pm
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Location: Athens
Local time: December 13th, 2017, 8:39 am
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My Rides: 1986 GL1200A Aspencade

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AApple wrote:
"Way off" how? Too fast, or too slow? :headscratch:


At 60 indicated, my actual speed is 54. At 80 indicated, my actual speed is 73.


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Share Post: Share on FacebookShare on TwitterShare on TumblrShare on Google+Share on MySpace  Post Number:#8  Unread postPosted: December 11th, 2017, 7:09 pm

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all Japan bikes used to say right on a sticker on the speedo , said it shows More than its doing , and some of them was around 10 mph off . always on the high side.

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