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post #1 of 7 Old Jun 1st, 2010, 11:16 pm Thread Starter
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Arrow GT Speedo

Is the 09 and above GT speedometer any more accurate than those on the LT? What's the level of deviation? Thanks.

Denny
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post #2 of 7 Old Jun 2nd, 2010, 12:28 am
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Re: GT Speedo

Quote:
Originally Posted by avonfloater
Is the 09 and above GT speedometer any more accurate than those on the LT? What's the level of deviation?
Don't know about the K13's, but I tested my K12's odometer over a 100-mile dead-straight stretch of I-5 and got a <1% error. The speedo pretty much always reads within 1mph of my gps, or of those random "Your Speed Is . . . " signs, so that gives under a 1% error, too.

Honestly, I just don't worry about it at all.

Ken
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post #3 of 7 Old Jun 2nd, 2010, 12:04 pm Thread Starter
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Arrow Re: GT Speedo

Thanks, Ken. My LT was off by nearly 10 mph at 80 mph. Good news.

Denny


Quote:
Originally Posted by meese
Don't know about the K13's, but I tested my K12's odometer over a 100-mile dead-straight stretch of I-5 and got a <1% error. The speedo pretty much always reads within 1mph of my gps, or of those random "Your Speed Is . . . " signs, so that gives under a 1% error, too.

Honestly, I just don't worry about it at all.
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post #4 of 7 Old Jun 2nd, 2010, 1:45 pm
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Re: GT Speedo

My 2008 GT speedo is 2 mph faster than the mph indicated on the GPS.

Dick Wood
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post #5 of 7 Old Jun 2nd, 2010, 5:24 pm
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Re: GT Speedo

Quote:
Originally Posted by REWDOC
My 2008 GT speedo is 2 mph faster than the mph indicated on the GPS.
Same for my 2009 1300GT.

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post #6 of 7 Old Jun 2nd, 2010, 6:52 pm
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Re: GT Speedo

My 2007 K1200GT speedometer always reads fast. My guess is that it is approximately 5% higher than actual speed, as measured by the Garmin Zumo 660 GPS and those roadside radar signs. I had the service tech look at it when brought in for other work, and the comment on the paper read (paraphrased), "Under 10% error is within spec."

If you reset the "Avg Speed" on the OBC while the cruise control is enabled, I note that the reading matches the GPS, not the analog speedometer. I believe that the analog speedometer is deliberately set by the manufacturer to read high. I have seen advertisements in magazines from a company that sells a device to recalibrate your speedometer. It costs $100.

The K1200GT odometer is very accurate. On a recent trip, the odometer read 2375 miles. The tripmeter read 374.7 (= 2374.7, I assume). The GPS read 2375.7 miles. A one mile difference in 2375 miles is 0.04% error. In case it matters, I started the trip with freshly installed PR2 tires. Perhaps tire wear accounts for the 0.04% error.
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post #7 of 7 Old Jun 4th, 2010, 10:55 am
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Re: GT Speedo

My 2008 is off 2+ MPH exactly at any speed according to the GPS. The odometer is off too although I haven't cared enough to figure out how much. Probably some silly percentage.

PS All my buddies' GSs are off by quite a bit as they're always complaining I'm doing 90+ when I'm really doing 80, on cruise control.

Ride fast. Take chances.

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