Probably a daft question. A mate at work's mate has a twin cylinder motorbike, one coil per cylinder. Up until recently it was running fine, he
had some need to disconnect either one or two coils, didn't find oout which, now it will only run on one cylinder.
From the days when my cars had the older-type cylindrical coils I can remember there being a + & - on the LT terminals, but why is this important?
Surely they just connect to either end of a coil inside the casing, so polarity (apart from ensuring your tacho works properly if it's
coil-driven) can't really be much of an issue can it?
If you wire the coil backwards the magnetic flux will flow in the wrong direction.... which would not give you the charge you need on the main winding..... Might make your engine run backwards and the world implode.... not a good idea!
I don't know the science behind it, I leave that to my esteemed colleauge Tegwin.
But when I first had my ZZR running it sounded odd. Deneo had me swap the +ve and -ve leads on the coils and it sounded better.
Mike
coil is a transformer with primary and secondary windings.
you now ask if there are 2 windings, then why aren't there 4 terminals?
answer is that the primary and seconday have comon connection at the - terminal,. which is grounded by the points.
when points are open, the common point is disconnected from 0 V so the coils are in series thus increasing the voltage at the output.
If it is a pure coil with no electronics or diodes etc, then it shouldn't matter which way around it is connected. The only exception is if one
of the terminals is connected to earth via the casing, because if it is connected the wrong way around it will blow a fuse.
If the coil already is fubar, then trying it won't do anything other than blow the fuse
quote:
Originally posted by 02GF74
coil is a transformer with primary and secondary windings.
you now ask if there are 2 windings, then why aren't there 4 terminals?
answer is that the primary and seconday have comon connection at the - terminal,. which is grounded by the points.
when points are open, the common point is disconnected from 0 V so the coils are in series thus increasing the voltage at the output.
Read this from NGK
Regards
Davie
quote:
Originally posted by nitram38
If it is a pure coil with no electronics or diodes etc, then it shouldn't matter which way around it is connected.
BOOM!
maybe.