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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Inconsistent starting
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<blockquote data-quote="Magnetoman" data-source="post: 144157" data-attributes="member: 2806"><p>There's no way the heat range of the plugs was responsible for the problem. However, my speculation is that when the magneto was rebuilt it was not remagnetized. That would mean the bike has to be kicked over faster to generate a spark than would be needed with one that was properly magnetized. Hmm, unless the new plugs happened to have a smaller gap than the old ones, which would allow them to spark at a lower voltage, i.e. lower kickover speed, than your old plugs.</p><p></p><p>There's never enough information given in questions like this to be sure about a diagnosis. But, everything you wrote is consistent with a magneto that wasn't magnetized after rebuilding. An easy piece of additional data you could add to your thread would be the gaps of both of your present plugs. Also, of your old plugs, if you kept them.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 144157, member: 2806"] There's no way the heat range of the plugs was responsible for the problem. However, my speculation is that when the magneto was rebuilt it was not remagnetized. That would mean the bike has to be kicked over faster to generate a spark than would be needed with one that was properly magnetized. Hmm, unless the new plugs happened to have a smaller gap than the old ones, which would allow them to spark at a lower voltage, i.e. lower kickover speed, than your old plugs. There's never enough information given in questions like this to be sure about a diagnosis. But, everything you wrote is consistent with a magneto that wasn't magnetized after rebuilding. An easy piece of additional data you could add to your thread would be the gaps of both of your present plugs. Also, of your old plugs, if you kept them. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Inconsistent starting
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