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Lost manual How do you set up the sigma 500 bike speedometer

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WHY? Accuracy. Most of the Harley-Davidson motorcycles I've owned have had fairly accurate speedometers, but it's very common for the import bikes to be off by a considerable margin; the V-Strom is no exception. Realizing that my speedometer was reading higher than my actual speed, I cranked up my trusty handheld Etrex GPS and found that the stock instrument was off by a consistent 7.7% (when the speedometer reads 70 MPH, actual speed is 64.6 MPH). I figured that I had four options to deal with the problem: 1) ignore it, 2) watch the speedo and "guesstimate" my actual speed, 3) install an auxiliary speedometer, or 4) install a correction device.
Options 1 and 2 didn't much appeal to me. Installing an auxiliary speedometer is certainly a viable option, as some bicycle speedometers are very reasonably priced and can be calibrated to function with respectable accuracy. I was surprised to find a newSigma Sport BC500 unit on eBay for only $10.95 plus shipping, so I decided to check it out.
SERVICE. N/A. The eBay seller shipped promptly.
INSTALLATION. A piece o' cake, and one that could be accomplished by just about any owner. While the installation instructions are for a bicycle (go figure) it's not difficult to modify them for use on a motorcycle. The first order of business is to measure the circumference of the front tire and program the results into the unit; the measurement must be precise so that the readings will be accurate. The unit fits into a base that is easily attached to the handlebars with a rubber O-ring and a lead wire that is attached to a magnetic pickup. You'll need to find a way to attach it to the lower fork leg; since I only planned to use the unit for a short time I secured it in place with a heavy rubber band. It also comes with a magnet that's designed to attach to one of the bicycle's spokes. Since it obviously won't work on the V-Strom's front wheel another magnetic source must be used. Off to the local Radio Shack to pick up a pair of tiny rare earth super magnets ($1.89/pair, part #64-1895). These magnets, though very small--about 1/8"--are very powerful. I fit them into the head of one of the front brake rotor bolts, where magnetic force held them in place nicely. Here's how things looked;
Lost manual - sigmasportpickup.jpgRESULTS. Pretty darned good. Because the magnetic pickup detects only one pulse signal per revolution (the V-Strom's speedometer registers about 80 signals per revolution) there is a small lag in displaying the speed but at constant speed it's very accurate.
Worth the money? Absolutely. I don't plan to use the unit permanently, but it's an incredibly inexpensive way to provide an accurate speedometer reading. At less than $20 for the entire setup it's a heckuva deal!

Posted on Jun 22, 2009

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I lost the manual for my Sigma 506 bike computer and can't re-program any of the functions. Can I download the manual?


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The wheel size chart in the instruction manual does not include a tyre size of 700 x 54c (29 x 2.1) so I can't set it. Can you advise the setting requied?


It's in the manual. Measure the wheel size and enter it manually.

http://www.sigmasport.com/en/allgemein/showdatei/?download=1&name=2_1_Manual_BC_1106_nat.pdf


There's a picture of how to determine the circumference by rolling the wheel one revolution and measuring it. Be as accurate as you can (to the mm).

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1 Answer

Lost my set up manual for sigma 506 speedometer.


You can get the manual on the link below.

http://www.sigmasport.com/en_media/produkte/bikecomputer/topline_wired/bc506/allgemein/visuals/ba.pdf

Good Luck and please rate 4 thumbs up for the free answer

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I have lost the manual and have no idea how to set my Sigma Sport BC 400.


Hello there please try thislink and seeif you can find your bicycle there
best regards michael
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