crap speedo but good mpg - Honda CRF1000L Africa Twin Forum
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post #1 of 20 (permalink) Old 04-29-2017, 04:29 PM Thread Starter
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crap speedo but good mpg

My speedo is over-reading by almost 10% which is twice as bad as the NC 750 I have just parted with. However the Honda mpg calculator is too pessimistic. It said I was getting 54.3mpg (imperial) when in fact I was getting 56.7mpg, which I'm quite pleased with.
Mike
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post #2 of 20 (permalink) Old 04-29-2017, 05:16 PM
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Makes me feel better, I was out the other day and mine was reading just over 100mph! Now I have an excuse if I get stopped for speeding!
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post #3 of 20 (permalink) Old 04-29-2017, 05:40 PM
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I agree Mike. I leave the satnav in big screen mode and rely on that. Speedo is way out.
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post #4 of 20 (permalink) Old 04-29-2017, 06:05 PM
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Makes me feel better, I was out the other day and mine was reading just over 100mph! Now I have an excuse if I get stopped for speeding!
I know here in Canada the speedo's are out by a good margin, mine is out by almost 10 kmh ,but I have read several American posters on the web stating that there speedo's are dead on accurate,so be careful your excuse may not be valid .
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post #5 of 20 (permalink) Old 04-29-2017, 08:24 PM
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U.K. Speedos a clear 10% optimistic, at least mine is, and reads temp around 2 degrees c high..... why ?
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post #6 of 20 (permalink) Old 04-30-2017, 04:14 AM
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I see there is a Speedo Healer available so you can adjust recalibrate for a more accurate reading. Obviously it's not just the speed but the trip that ends up showing more miles than you have actually travelled. Don't know if I could be fussed.
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post #7 of 20 (permalink) Old 04-30-2017, 05:33 AM Thread Starter
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I see there is a Speedo Healer available so you can adjust recalibrate for a more accurate reading. Obviously it's not just the speed but the trip that ends up showing more miles than you have actually travelled. Don't know if I could be fussed.
I don't think that's necessarily so PJ. My NC750 odometer was spot on and if the trip meter is driven from that then it could be accurate. AFAIK the odometer accuracy is regulated by law and I guess the speedo just must not under-read or the manufacturers would get sued by angry owners ticketed for speeding.
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post #8 of 20 (permalink) Old 04-30-2017, 05:43 AM
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I had never given it any thought until I read it on the speedo healer site. I would assume they have checked it out. The U.K. Con and use regs allow I think up to 10% speedo error and one would assume that may carry through to the odometer history.
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post #9 of 20 (permalink) Old 08-25-2017, 12:52 AM
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After a couple months of comparing speedo and GPS, my speedo reads 10% high linearly. 60 kmh indicated is 54, 110 indicated is 99.

But the odometer is spot on - on multiple trips the ODO and GPS matched; the last 2500km trip they were within 5km.

I'm running stock gearing with TKC80s.

Last edited by black99S; 08-25-2017 at 12:55 AM.
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post #10 of 20 (permalink) Old 08-25-2017, 03:40 AM Thread Starter
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In another thread I was suggesting that Honda (like some car manufcaturers could offer dealer settable options - such as setting S mode as the default. Maybe speedo (and outside air temp) recalibration could be options too.
I heard somewhere that manufacurers are allowed to fit speedos with up to 10% over-reading. Mine is slightly under - I would guess it's 9%
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