Speedo error (finally checked mine)

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ScootLemont
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Speedo error (finally checked mine)

Post by ScootLemont »

ok... I finally got around to checking my speedo & found what a lot of other people have - its 10% high.
20mph is really 18
30mph is really 27
45mph is really 41
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Cochese
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Post by Cochese »

How do you check it?
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ScootLemont
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Post by ScootLemont »

Brought along my GPS unit for a ride
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nissanman
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Post by nissanman »

Gotta love the GPS :)
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afriendofcheese
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Post by afriendofcheese »

I confirmed the same with a GPS as well. The faster you go, the less acurate the speedo is. Are we sure that GPS's are 100% accurate??
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ScootLemont
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Post by ScootLemont »

afriendofcheese wrote: Are we sure that GPS's are 100% accurate??
My old Garmin unit specs quote 0.1mph accuracy for MPH
My Tom Tom specs do not specify but durning my transition, I ran them both for a 500 mile trip (in my car) & the numbers were identical

so... I think they are pretty accurate
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MPA
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Post by MPA »

well I just did mine today - didn't do the incremental since it was in the pocket on my ride to work - saw 58 on the speedo and max speed was 52.5 on the GPS, which is a little disappointing. I've seen 60 on the speedo for about 1/2 a second one time.

Mine only has 520 miles or so on it so maybe as the break in continues it will improve.
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brimstone
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Post by brimstone »

hehehe..i've topped my out at WOT down hill at 63(indicated) so far....boy was that fun. hehehe
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KABanshee
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Post by KABanshee »

brimstone wrote:hehehe..i've topped my out at WOT down hill at 63(indicated) so far....boy was that fun. hehehe
Copy that, holding the wot with the full on head tuck going on as well. :P

It's all about the aerodynamics.

It crazy how much you can gain at wot and drafting.
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MPA
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Post by MPA »

I managed 55.5 on the ride home yesterday down a big hill but the speedo never hit 60 :shock: The other speed was on a flat though
Groovealufagus
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Post by Groovealufagus »

Speedo seems to be off the typical (for scooters) 10%. It's a pretty easy calculation when you're riding, in case you're being tailed by the fuzz. :lol:
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luckyleighton
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Post by luckyleighton »

On the accuracy of GPS, it is extremely accurate if you take into account the short delay between transmitting and receiving the data. But if you maintained a speed for a few seconds it would be more accurate than any RPM based speedometer.
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ScootLemont
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Post by ScootLemont »

Isnt that how it gets the speed?- by measuring the difference in delays transmitting from differnt satelites?
but yeah... mine does take a second to update a change in speed - i was cruising steady when I took my readings.
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