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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Spark plugs 1000 and 500
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<blockquote data-quote="greg brillus" data-source="post: 99846" data-attributes="member: 597"><p>I have to agree on those points, it seems a fine line between a plug that will burn off sooty deposits and one that gets hot enough to promote detonation. I choose between 5's and 6's anything higher is too cold and will soot up given most of these engines run quite rich. Some engines like protruded tip plugs too like a BP5 ES or similar, the fine wire ones work ok but the extra expense is really wasted. I'm with you Robert, with regards to the BTH whose spark at low speed seems quite week, and I am leaning towards reinstalling the original Lucas mag on my Rapide for easier starting. As great as all these new ignitions are (or seem to be) it is still very hard to beat the output from a descent original magneto.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 99846, member: 597"] I have to agree on those points, it seems a fine line between a plug that will burn off sooty deposits and one that gets hot enough to promote detonation. I choose between 5's and 6's anything higher is too cold and will soot up given most of these engines run quite rich. Some engines like protruded tip plugs too like a BP5 ES or similar, the fine wire ones work ok but the extra expense is really wasted. I'm with you Robert, with regards to the BTH whose spark at low speed seems quite week, and I am leaning towards reinstalling the original Lucas mag on my Rapide for easier starting. As great as all these new ignitions are (or seem to be) it is still very hard to beat the output from a descent original magneto. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Spark plugs 1000 and 500
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