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Hi,just got a sigma bc 800 and a 1600,it has been mounted on the rear hub.but so far it’s not calibered properly to kmph.shows the reading and then doubles it,also is not consistent in the reading display.any inputs
1987 Yamaha RD 350B
In first gear whack the throttle.it comes with a booklet which has the instructionf for calliberating it. basically depends on wheel circumference which you need to measure.
for correct readings, you need to change the magnet you are using. why don’t you ask the guys at rddreams ? they have been doing it for ages.
have done it,am taking a second opinion pal.the booklet is not much help,have fed the circumfrence already.
1987 Yamaha RD 350B
In first gear whack the throttle.Sorry guys, but are these Sigma’s you talk about speedos. Are they like pushbike ones with magnets fixed on the wheel?
yes tht’s the one,used for cycles mostly but give fairly accurate readings.any ideas?
1987 Yamaha RD 350B
In first gear whack the throttle.I’ve dug up a few UK based resources on the Sigma calibration. Seems an interesting one this. Try:
https://www.strangely.org/owned/bikecomp/ This guy fitted one to a Lotus Seven replica and then calibrated it by testing on a measured mile.
https://www.st1100.org/farkles/sigma.html Shows an ST1100 fitting.
If there’s not the info on those sites, maybe an email to Sigma could help via https://www.sigmasport.com/index_e.html
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