I had a couple of Lumenition optical switch failures on my Sprint engine towards the end of last year about 500 miles apart. The first was a pretty old one that has rubber insulation on the wires, that failed with an intermittent fault that got progresively worse. Its replacement was much newer but failed suddenly with no warning at all.
I have replaced it with a Pertronix LU-244 and that seems to be running ok but not had chance to put many miles on it yet. Its a very neat installation inside the dizzy with only two wires feeding it. One 12v ignition feed and the other to the coil + terminal.
Just wondering if anyone has a Petronix LU-244 for a spare to go on my other engine?