Re: No spark

Posted by LukeM on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/No-spark-tp1726168p1732255.html

OK, since neither coil is firing, find a good schematic of the wiring for your model motorcycle.  Trace down the wiring from the battery through the coils, then through the points, and down to ground.  You should have +12V somewhere, and if you measure from the points to ground, opening and closing the points will show a change in voltage.

You should get the same results on both sets of points.

If you don't have +12V anywhere in the ignition circuit, I'd look for a blown fuse or a broken wire somewhere.  Re-Run has a 1978 model of your bike, and should be able to help.

Keep at it.  Don't get discouraged.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.