St1300 Speedometer Versus GPS Speedometer

CaST

My first risers
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On my cars their speedometers have always been right on the nose when compared to the speedometer of the Garmin 2610..

However, I just got the Powerlet right side plug installed and hooked up my Garmin 2610. Today for a short right the Garmin 2610 had 15 feet accuracy with 7 satellites telling me where I am. However the ST1300 speedometer says that I am going 4.5 to 5 miles faster than the Garmin says at all speeds.

First, which do I trust the GPS or the ST1300? Again on the cars, the GPS has always matched the speedometers. If I trust the GPS, can I adjust the ST1300 speedometer?

Thanks,

Patrick
 
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10% rule

GPS is more accurate. I've noticed that motorcycle speedo's tend to be off by about 10% at all speeds. Sorry, I guess I should have been more accurate with all of the mathematics professors on the site.:D
:03biker:
 
Last edited:

crazykz

R.I.P. - 2012/06/16
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I don't know if it is a full 10% off but I'll say about 5%-7%. This is a real issue when you do Ironbutt time rides like 1000 miles in 24 hours or 1500 miles in 24 hours. The GPS is correct and it is what I go by when I ride with it. I rarely if ever use the speedo when running the GPS.

Curt
 
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Hebron, CT
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Unfortunately GPS is correct..The speedos are off..which for 14k I feel should be accurate..But since I don't want Paul from Texas coming down on my 'complaining, whining and bitching', since most motocycles are off this is just fine. (Inside joke :rolleyes: few will get)
 

crazykz

R.I.P. - 2012/06/16
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Funny thing is that the odometer is only 2% off. Figure that in when you're trying to calculate MPG.

Curt
 

Putt

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Speedo healer or Yellow Box hundred bucks..
BC 800 bicycle speedometer around 20...
Greater than 1% accuracy on BOTH the
odometer and speed.


Putt..
 
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CaST

CaST

My first risers
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Sonoma, CA
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I have instant message on and I am not getting notified.
 
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Staffordshire - UK
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Well Out

Speedo Verses GPS

My speedo is well under the reading given by the Garmin 2610.

At 70 MPH on the Garmin, St speedo reads 65MPH, and so on.

Okay, we could say that the speedo is reading on the 'Correct' side of the law in that you are normally 5 MPH below the speed limit for the road you are travelling on.

However, if you are running on the speedo and are 5 MPH below the speed limit for that particular road, watch out for the trucker or idiot in your mirrors, they may just follow the brown brick road and go straight up yer 'Jacksey'!

I run with the GPS, it gives me a more positive read out, but I am careful if I have to twist the throttle a little as there is a slight time lag before the GPS registers your adjusted speed, this could be enough to trigger a speed camera over here in the UK.

TTFN

Mick
 

Burger

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Here in the UK where we have a gazillion speed cameras there are certain stretches of road where everyone apart from an idiot (or an already banned driver in a stolen car, hm, that would be an idiot) sits rigidly at the speed limit (according to their speedo).

Yesterday, I was on such a stretch a couple of times and I noticed how when I sat at the speed limit I was still a little faster than anyone else. The point being, if my speedo is off, everyone elses is worse :D

Regards,
 
Joined
Apr 7, 2005
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2
speedo reads

i have read somewhere that due to calibration + - error all speedos are set approx 10% lower to take into account this calibration deflection error otherwise manufacturers would be blamed for all speeding if the tried to be spot on as the danger of them being high would have all the trafic agancies going mad, So having said this am suprised that Mr honda would have it wrong

ask a copper ( sorry am from the uk ) law inforcment officer to follow you the danger is if its wrong you get a ticket !!!!!! :bow1:
 
Joined
Aug 11, 2014
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Lake Zurich, Illinois
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04 ST1300
No need for adjustments. Just make a mental note of it. The speedo is off by 10% between 0-30. But improves in accuracy to about 5% between 50-100. Here is what I found thru GPS comparison.

Indicated GPS
50 46-47
60 56
70 66-67
80 75
 

dduelin

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Beware the zombie thread. 10 years in the grave until today!
 
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I use the GPS when driving down the road....but use the speedo when bragging to my buddies about how fast I took that last curve.:biker: :D
 
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here we go again ,,, what is your true gas mileage. After 100k miles on your bike is it really only 90K?? In my opinion there is something very wrong that all st owners know about but Honda is like Sargent Shutlz, know nothing, see nothing...
 
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kankakee
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When I fist got my st I was getting about 48 mpg, using my gps I get about 42 mps... sucks doesn't it
 
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May 29, 2006
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Location
Aurora, Colorado
US ST speedo's are typically off 7-8%, but the odometers are supposedly accurate. Thank the lawyers for that. Police speedo's are supposedly spot on. If you correct the speedo with a Speedhealer, the odometer will be off by 7-8%. Choose your poison. Personally, I'd use the GPS for speed and the odometer for mileage.
 
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