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Posted 7/10/2008 10:25:27 AM
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Last Login: 7/10/2008 10:14:22 AM
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Has anybody had a problem with their speedometer showing a faster speed than they are actually moving at. I have a 2004 750 aero and the speedometer is 5mph faster than it should be. Bike is all stock with original tires and no changes in gearing.
Thanks
Tom
Post #172616
Posted 7/10/2008 2:26:34 PM


Supreme Being

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Last Login: 11/25/2008 2:59:06 PM
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almost all OEM motorcycle spedometers read faster than actual speed. I've never experienced one that didn't and know that most rider friends have had the same. Usually they are off by a percentage, (often about 5-10%) so that the gap between seen and actual gets bigger as the bike goes faster. figure out the percentage (by GPS, timing, car along side, etc.) and then you'll be able to know your actual speed from the incorrect reading.

for example: my bike's speedo is about exactly +10% at all speeds. So if I'm actally going 30, it will read 30 + 10% (of 30) = 33. So I know when I see 33, I'm going 30. When I see 77, im going 70. when I see 165, I'm looking at the last thing I'll ever see because I shouldn't be taking time to look at my speedometer when I'm going 150. (OK, not too often, a couple times at Road America track days for a few seconds at a time).

So now I know my speed limits. say i'm willing to go 70 in a 65 mph zone, then my speed limit is 77 on my speedo. not that I'd speed.


K$
Post #172618
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