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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Coil ignition for my C series Egli twin
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<blockquote data-quote="b'knighted" data-source="post: 115145" data-attributes="member: 59"><p>I use a modified Ford distributor (probably 60s) and managed to get an unused cap for it when I was setting it up about 40 years ago. I removed two of the ht contacts and blanked the holes in the cap with plastic number plate bolts then replaced the brass plate on the top of the rotor arm to extend its tip ensuring that the sparks wouldn’t have to jump excessive distances with the asymmetric firing. I removed the two sets of points that had been fitted and made up a clip on rotor to be carried by the cam to break the optical sensor of a Lumenition Optronic system that I'd bought years earlier for a car. A second breaker blade is fitted onto the first so that the timing can be individually adjusted for each cylinder. Before it was fitted to the engine I took it to a section meeting where, with the addition of a 9v pp3 battery, I was able to show its slow rotation sparking. The insulation sprouting from some of the potting is now failing but the system has given has given great reliability on both car and bike since the early seventies. The only improvement I would now like to the system would be a vernier adjustment like the Lucas vacuum advance BMC distributors had.</p></blockquote><p></p>
[QUOTE="b'knighted, post: 115145, member: 59"] I use a modified Ford distributor (probably 60s) and managed to get an unused cap for it when I was setting it up about 40 years ago. I removed two of the ht contacts and blanked the holes in the cap with plastic number plate bolts then replaced the brass plate on the top of the rotor arm to extend its tip ensuring that the sparks wouldn’t have to jump excessive distances with the asymmetric firing. I removed the two sets of points that had been fitted and made up a clip on rotor to be carried by the cam to break the optical sensor of a Lumenition Optronic system that I'd bought years earlier for a car. A second breaker blade is fitted onto the first so that the timing can be individually adjusted for each cylinder. Before it was fitted to the engine I took it to a section meeting where, with the addition of a 9v pp3 battery, I was able to show its slow rotation sparking. The insulation sprouting from some of the potting is now failing but the system has given has given great reliability on both car and bike since the early seventies. The only improvement I would now like to the system would be a vernier adjustment like the Lucas vacuum advance BMC distributors had. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Coil ignition for my C series Egli twin
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