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Post by jrnyman on Aug 16, 2013 20:42:36 GMT -5
Having just recently verified the drastic inaccuracy of my speedometer via a GPS app, I'm wondering if this also means the odometer is incorrect.  |
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Post by ckizer on Aug 16, 2013 21:13:31 GMT -5
Did you try and measure it? The speedo cable on mine fell out for a day in which I drove 40 miles.
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Post by DaveC on Aug 16, 2013 21:15:28 GMT -5
Not necessarily
On my Honda Shadow 1100 Sabre the speedo is off 10%, the odo is spot on
Has to do with gearing in the speedo
Same with my Aspencade
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Post by domindart on Aug 16, 2013 21:16:10 GMT -5
I don't think so *)
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Post by sailracer on Aug 16, 2013 22:01:09 GMT -5
[replyingto=davec]DaveC%20[/replyingto]how do you know that the odometer is accurate? did you check it against a measured mile? just curious
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Post by geh3333 on Aug 16, 2013 22:20:45 GMT -5
if your speedo is inaccurate yes the mileage is def off also. there is no maybe or it might be ok. if your speedo is running 5 mph faster, then every hr yr adding an extra 5 miles to your odometer. this is a fact.
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Post by geh3333 on Aug 16, 2013 22:41:29 GMT -5
you can fix theodometer every so ofter by spinning the odometer wire backwards . say your speedo is 5 mph off through out your mid and top end and you have 10000 miles on th odometer you can take off about 800 miles . " i think " i di it in my head so please correct me i im wrong. for evedy mile you will be about .0083 miles off. so 10000 x .083 is actually 830 miles. your scoot will show an extra 830 miles then it really has.
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Post by freefour1968 on Aug 16, 2013 23:08:41 GMT -5
you can fix theodometer every so ofter by spinning the odometer wire backwards . Unless things have changed , that won't have any effect on the odometer . They are built with a clutch in them to allow for backward spinning ...it is so you can't roll back the mileage . At one time you could like in the sixties but not after then . My dad was a car salesman and in the 80's til 2010 proved you would actually have to physically roll the gears back or the numbers by hand ( not saying he did it to a customers car lol but seemed all our cars had "realy low miles" when we needed to sell one ). Once they went digital that put an end to that also . |
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Post by prodigit on Aug 16, 2013 23:18:47 GMT -5
On my ATM50 the speedo is off by a million mph or something, but the odo is on the dot correct.
How I know this?
I plotted out a 200 mile route on google maps, rode it, and the odo was within 1.5% correct (the 1.5% variation could be attributed to not following the route perfectly (and making a few pit stops), eventhough the speedo was at least 25% off
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Post by geh3333 on Aug 16, 2013 23:30:21 GMT -5
the china scoots and others are very different from cars you can most def 100% roll the mileag back ive tried it before for an old post.
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Post by geh3333 on Aug 16, 2013 23:46:52 GMT -5
with a .o83 at 5 mph off this could bea veryry minimal difference at 200 miles. about 16 miles but many scoots arnt really off much until mid to top range mph so the slower mph will have very little i no affect on the odometer. you would have to figure out how many miles your scoot went at 1- 20 or more mph. this could b why you only noticed a small % difference.
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Post by yelloscoot on Aug 17, 2013 0:30:05 GMT -5
okay,...I have seen on here, or maybe it was the late SD {R.I.P}, that the odometer is directly connected to the cable. Also that it is, or very close to, accurate. The speedometer works off of a magnetic pick-up. That is where the inaccuracy of the speedo comes in. Don't get me wrong...that is what I have read on the forum and have remembered it since. I have checked it with the My Tracks app. The odometer did match the GPS on a 5.6 mile trip to work. (o)
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Post by jrnyman on Aug 17, 2013 2:24:21 GMT -5
with a .o83 at 5 mph off this could be a very minimal difference at 200 miles. about 16 miles but many scoots arnt really off much until mid to top range mph so the slower mph will have very little i no affect on the odometer. you would have to figure out how many miles your scoot went at 1- 20 or more mph. this could b why you only noticed a small % difference. My speedometer is off by leaps and bounds - even at the slower speeds. Speedometer:25 Actual 19. Sp:33 Actual: 25. Sp: 61 Actual: 45 Sp: 78 Actual: 58 (Top speed yesterday using a GPS app as well as driving side by side with my wife in the car.) Your explanation is spot on correct. The upper speeds are significantly further apart from the actual mph/kmph. And, based on that fact, there's absolutely no way to determine the actual number of miles on the scooter. And, to take it a step further (which is going to most likely upset some people...) the actual MPG's everyone has taken note of is actually incorrect also if the odometer was the sole instrument used to measure distance traveled.   I'm assuming there's no real way to properly calibrate our instruments. Maybe I'm wrong...?? |
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Post by sailracer on Aug 17, 2013 3:32:58 GMT -5
SURE there is----if you're a watchmaker  |
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Post by geh3333 on Aug 17, 2013 5:58:44 GMT -5
[replyingto=jrnyman]jrnyman[/replyingto]i know this has been talked about before but ill say it again, many that have 13 inch wheels have an acurate speedo many think its because they use the same speedo puck as they use with the smaller wheels. so one can try a higher profiled tire if it will fit on a 10 inch or other wheeled scoot. ive seen a really nice digital gauge cluster on ebay that i would love to have. not that i will change the speedo prob for anyone , i just like it.
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