GPS VS Speedometer

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Old Apr 29, 2006 | 06:03 AM
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Default GPS VS Speedometer

Any of you guys with GPS units check the accuracy of your speedometers? I have a Garmin Quest but do not have a mount for the KLX. The reason I ask is it seems like the speedometer on the KLX is very optimistic. I was going an indicated 75 and it seemed like most people were passing me. BTW, I live in CT, not Montana...LOL
 
Old Apr 29, 2006 | 06:23 AM
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Yes i have, I have found the speedo to be about 5mph off, going 60 the gps indcates 55
 
Old Apr 29, 2006 | 06:40 AM
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Default RE: GPS VS Speedometer

Thank you. Have you noticed that the error increases at higher speeds?
 
Old Apr 29, 2006 | 06:56 AM
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Default RE: GPS VS Speedometer

ORIGINAL: FM_Thumper

Thank you. Have you noticed that the error increases at higher speeds?
I think it is pretty linear - here's what mine shows:

...

Mine seems to be off about 10 or 11 %. Dealer said that was normal and that it was not adjustable. [:@]



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Old Apr 29, 2006 | 01:16 PM
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I've had 3 Kawi's in my life and all 3 speedos were off. My ZRX is about 10% off. Verified with my Garmin GPS. Because of which, your odometer will be off also.
 
Old Apr 29, 2006 | 05:38 PM
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ORIGINAL: KevyzToy

I've had 3 Kawi's in my life and all 3 speedos were off. My ZRX is about 10% off. Verified with my Garmin GPS. Because of which, your odometer will be off also.
I checked my odometer too, and while the speed is off about 10%, the odometer was off about 5%.

Regarding speed, though, at least in 6th gear I find I look at the RPM gauge instead of the speedometer since 4000 RPM = 40 MPH, 5000 RPM = 50 MPH, etc. This is with stock gearing - that will change if you've changed out the C/S sprocket for a smaller one or the rear sprocket for a larger one.

The inaccurate speedometer does bug me though. Apparently it is not adjustable, either. I'm contemplating building a new set of instruments to fix this.
 
Old Apr 29, 2006 | 05:48 PM
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I'm with ya. Both my KLR and KLX are roughly 10% off.
 
Old Apr 30, 2006 | 03:47 AM
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ORIGINAL: Nobrakes



I checked my odometer too, and while the speed is off about 10%, the odometer was off about 5%.

Regarding speed, though, at least in 6th gear I find I look at the RPM gauge instead of the speedometer since 4000 RPM = 40 MPH, 5000 RPM = 50 MPH, etc. This is with stock gearing - that will change if you've changed out the C/S sprocket for a smaller one or the rear sprocket for a larger one.

The inaccurate speedometer does bug me though. Apparently it is not adjustable, either. I'm contemplating building a new set of instruments to fix this.

That's a great idea! Your'e right, the "tachometer speedometer" is much more accurate. I think it's great that this bike has a tach, which is so rare on a dual purpose bike. Nobrakes discovered yet another use for the tach. LOL.

The inaccurate speedometer does not really bug me that much but the optimistic odometer does bother me a little bit. I thought I was getting 70 mpg but since it's 5% optimistic, I'm actually only getting 66.5...

 
Old Apr 30, 2006 | 12:57 PM
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ORIGINAL: FM_Thumper

That's a great idea! Your'e right, the "tachometer speedometer" is much more accurate. I think it's great that this bike has a tach, which is so rare on a dual purpose bike. Nobrakes discovered yet another use for the tach. LOL.
??? I have never owned a bike without a tach, and I have owned a lot of dual purpose bikes ... oops I lie my YZ125 didn't have a tach .. but then I'm yet to see a MX bike with any instruments
 
Old Apr 30, 2006 | 01:34 PM
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??? I have never owned a bike without a tach, and I have owned a lot of dual purpose bikes ... oops I lie my YZ125 didn't have a tach .. but then I'm yet to see a MX bike with any instruments
Well I guess I was thinking of my XT225 which doesn't have one, and the two other bikes that I was considering the DRZ-400S & the DR650S did not have a tach.
 



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