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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
iradium plugs
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<blockquote data-quote="Tom Gaynor" data-source="post: 5067" data-attributes="member: 4034"><p><strong>Plugs</strong></p><p></p><p>More out of curiosity than anything else, because the front plug looked a bit sooty, and because I had the occasional miss-fire on tickover, I changed my NGK B6ES's for NGK B5ES's. I had previously ameliorated a fouling front plug (burnt oil from a worn (out) guide) by using B6 rear, B5 front, so I knew that a B5 was the solution to at least one plug-fouling problem. The B6 had to be changed every 120 miles (the pot went dead) whereas with the B5 it would go twice that.</p><p>I can't say I notice much difference with 2 x B5, maybe it ticks over a little bit better, but I CAN say that it HASN'T resulted in instantaneous disaster, despite cruising at 75-80 with the odd burst up to 90.</p><p>I reckon that most of you guys are using plugs that are at least a grade too hard, so that iridium (to say nothing of unobtanium) makes a critical difference. If you used softer plugs, then even if the electrodes were made from silly putty, the problems would go away. Melted spark plugs are about as common as asteroid strikes. Not everything is improved by being softer, but I think NGK plugs are.</p><p>(It's also true that I suspect Denso offer bigger discounts for exclusively selling only their plugs - two dealers in Aberdeen sell ONLY Denso plugs - but I'm an NGK man of long standing and immune to such blandishments.)</p></blockquote><p></p>
[QUOTE="Tom Gaynor, post: 5067, member: 4034"] [b]Plugs[/b] More out of curiosity than anything else, because the front plug looked a bit sooty, and because I had the occasional miss-fire on tickover, I changed my NGK B6ES's for NGK B5ES's. I had previously ameliorated a fouling front plug (burnt oil from a worn (out) guide) by using B6 rear, B5 front, so I knew that a B5 was the solution to at least one plug-fouling problem. The B6 had to be changed every 120 miles (the pot went dead) whereas with the B5 it would go twice that. I can't say I notice much difference with 2 x B5, maybe it ticks over a little bit better, but I CAN say that it HASN'T resulted in instantaneous disaster, despite cruising at 75-80 with the odd burst up to 90. I reckon that most of you guys are using plugs that are at least a grade too hard, so that iridium (to say nothing of unobtanium) makes a critical difference. If you used softer plugs, then even if the electrodes were made from silly putty, the problems would go away. Melted spark plugs are about as common as asteroid strikes. Not everything is improved by being softer, but I think NGK plugs are. (It's also true that I suspect Denso offer bigger discounts for exclusively selling only their plugs - two dealers in Aberdeen sell ONLY Denso plugs - but I'm an NGK man of long standing and immune to such blandishments.) [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
iradium plugs
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