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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Old Coil Ignition Points Identification
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<blockquote data-quote="Monkeypants" data-source="post: 108587" data-attributes="member: 2708"><p>Simon, you aren't the first to tell me I have the wrong end of the stick re the narrowed points gap causing the problem. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p>My system uses 2 coils and 2 condensers.</p><p>It doesn't matter if I fit Lucas points or other points, if the gaps are closed to 15 thou, one cylinder cuts out every time.</p><p>So I set the Lucas points at 25 thou , then five years and twenty thousand miles they might have closed up to 23 thou. It's not a high maintenance system!</p><p>Anything above 20 thou works on this ignition. Below 20 is where the problems start. That doesn't happen with the Lucas points so long as you adjust them once in a decade or so.</p><p>When looking at the system with a multi tester on hand it's easy to see why the narrow points gap robs one cylinder of spark.</p><p>Pete explained it above and did a much better job of it than I would.</p><p>John McDougall had a look at the ignition when the engine was in at his shop for a top end rebuild not long after buying the bike in 2004.</p><p>He was familiar with the system, named it ( I've forgotten the name) and said " You need to run a wide gap with these, around 25 thou"</p><p>Yup.</p><p></p><p>Re the heels wearing- no amount of lube will help the Daichi points. The heel material looks the same as the Lucas, but it isn't the same.</p><p>On the other hand a few drops of o on the wicks of the Lucas then forget about them for years and many thousands of miles.</p><p>Photo of the OEM Lucas points that work so well on my ignition.</p><p>When stockpiling the OEM Lucas points I purchased 2 sets on eBay that were packaged in Lucas boxes just like the one in the photo.</p><p>The point sets however were not Lucas. Instead they appeared to be the Daichi items, or copies of those. They did not have a made in England stamp on the plate and there were other differences from the genuine OEM Lucas items.</p><p></p><p>These look to be the real deal</p><p></p><p>[URL unfurl="true"]https://www.ebay.com/itm/NOS-Lucas-Points-60600271-Triumph-BSA-Norton-Twins-NOS-LU184-/331942387862?_mwBanner=1[/URL]</p><p></p><p></p><p></p><p>Glen</p></blockquote><p></p>
[QUOTE="Monkeypants, post: 108587, member: 2708"] Simon, you aren't the first to tell me I have the wrong end of the stick re the narrowed points gap causing the problem. :) My system uses 2 coils and 2 condensers. It doesn't matter if I fit Lucas points or other points, if the gaps are closed to 15 thou, one cylinder cuts out every time. So I set the Lucas points at 25 thou , then five years and twenty thousand miles they might have closed up to 23 thou. It's not a high maintenance system! Anything above 20 thou works on this ignition. Below 20 is where the problems start. That doesn't happen with the Lucas points so long as you adjust them once in a decade or so. When looking at the system with a multi tester on hand it's easy to see why the narrow points gap robs one cylinder of spark. Pete explained it above and did a much better job of it than I would. John McDougall had a look at the ignition when the engine was in at his shop for a top end rebuild not long after buying the bike in 2004. He was familiar with the system, named it ( I've forgotten the name) and said " You need to run a wide gap with these, around 25 thou" Yup. Re the heels wearing- no amount of lube will help the Daichi points. The heel material looks the same as the Lucas, but it isn't the same. On the other hand a few drops of o on the wicks of the Lucas then forget about them for years and many thousands of miles. Photo of the OEM Lucas points that work so well on my ignition. When stockpiling the OEM Lucas points I purchased 2 sets on eBay that were packaged in Lucas boxes just like the one in the photo. The point sets however were not Lucas. Instead they appeared to be the Daichi items, or copies of those. They did not have a made in England stamp on the plate and there were other differences from the genuine OEM Lucas items. These look to be the real deal [URL unfurl="true"]https://www.ebay.com/itm/NOS-Lucas-Points-60600271-Triumph-BSA-Norton-Twins-NOS-LU184-/331942387862?_mwBanner=1[/URL] Glen [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Old Coil Ignition Points Identification
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