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UriahB
PostPosted: Wed Jun 14, 2006 10:00 pm  Reply with quote
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So everyone knows that scooter speedos are off 5-10 mph, right? Well I understand you can get an accurate GPS reading, but I'm wondering if you can't just adjust the thing somehow to zero in on an accurate number. Or maybe replace it with an aftermarket speedo or something? Sorry for the noob question, but it has really been bothering me that scooter manufacturers can't get such a simple thing right (maybe that's really why nobody gets speeding tickets on scooters).
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Kevin K
PostPosted: Wed Jun 14, 2006 10:04 pm  Reply with quote
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Imagine my disapointment that this thread isn't actually about swimwear.
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Lisa
PostPosted: Thu Jun 15, 2006 2:22 am  Reply with quote
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speedo shmeedo. I haven't had one in ages. Why would anybody want one anyway?
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Adam
PostPosted: Thu Jun 15, 2006 8:16 am  Reply with quote
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It is not just scooters with speedometer error. Most motorcycles straight from the manufacturer have about the same percentage of error, at least according to the sources I've found. Even cars have an issue, though usually less severe. Using a GPS and found that very few cars are within a mile per hour of their speedometer reading, though they are usually off by only 3 or 4 mph.

All speedometer readings I've seen have been high, that is reporting a speed faster than actual, which I guess from a manufacturer point of view is the side to error on. If they read low and people got speeding tickets because of it you know there would be a lawsuit.
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Matty
PostPosted: Thu Jun 15, 2006 8:26 am  Reply with quote
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UriahB wrote:
Or maybe replace it with an aftermarket speedo or something?


bicycle speedo

http://www.aerostich.com/catalog/US/Topeak-Speedometer-p-16361.html

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John B.
PostPosted: Thu Jun 15, 2006 8:34 am  Reply with quote
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That is cool. I wonder if you need spoked wheels to mount the magnet on.
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Matty
PostPosted: Thu Jun 15, 2006 9:00 am  Reply with quote
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You can do it pretty easy, just don't know if the disc on a stella makes it easier or harder?

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UriahB
PostPosted: Thu Jun 15, 2006 3:56 pm  Reply with quote
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Ah, I was hoping for some way to make my actual speedometer reliable. Seems like it ought to be so much easier. I personally think they exaggerate the differnetial on scoots so people don't realize how actually slow they are going. "My stock PX can do 65!" Yeah right.
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Spikehead
PostPosted: Thu Jun 15, 2006 7:33 pm  Reply with quote
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John B. wrote:
That is cool. I wonder if you need spoked wheels to mount the magnet on.


Nope. It'll work on any kind of wheel. I usually mount to the brake rotor (if there is one... stupid P200).

I also through away the magnet that comes with the kit, and spend another $2 on a super alinco or neodymium(sp?) button magnet at Radiohack. It's stronger field means you don't have to worry quite so much about proximity of magnet and pickup coil.

BTW, that 'Stich unit is way overkill IMO. A basic unit like the SigmaSport, Cateye's, etc., provide all the info most riders want/need. And, if it's boosted by some lowlifescumsuckingbastard, you're only out a few bucks. (I've paid less than $10 for mine.) Some manufacturers also sell additional mounting/wiring kits if you want to move the brain/display from one bike to another*. Considering the small investment this is a waste of time as far as I'm concerned - YMMV.

The Sigma BC800 is by far the most used unit in the Long Distance/Endurance MC Riding world. There are hundreds of them out there with many, many road miles in all manner of weather conditions, and the failure rate has been extremely low. Here's a great primer on installation of that device courtesy of a pal over on the ST1100 mailing list:

http://www.st1100.org/farkles/sigma.html

*Note: this only works if the same size tire is shared by the different bikes, as you need to program wheel circum. into the unit for accurate readings.

Mike
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Spikehead
PostPosted: Thu Jun 15, 2006 8:07 pm  Reply with quote
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UriahB wrote:
Ah, I was hoping for some way to make my actual speedometer reliable.


Some MC owner groups have found that trading a speedo gear from a '89 Kawasuki Blaster 5000 for the same part out of a Yamonda YZBX nets an reading that's accurate. How they learn these things, and who has time to 'speriment with diffent geat drives I'll never know - but I'm glad those folks are out there!

Sadly, I don't know of the existance of any such info on scoots.
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Matty
PostPosted: Fri Jun 16, 2006 6:50 am  Reply with quote
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How about borrowing a gps and see how far off it is at different speeds then just remember that. Or change the face plate to what it should, just repaint the numbers.

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UriahB
PostPosted: Fri Jun 16, 2006 7:00 am  Reply with quote
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Neither of those options appeals to my anal retentive nature. :)
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John B.
PostPosted: Fri Jun 16, 2006 8:42 am  Reply with quote
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Matty wrote:
Or change the face plate to what it should, just repaint the numbers.

My scooter goes to 11!
thanks for the info spike head.
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