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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
'Correct' heat range
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[QUOTE="BRush, post: 356499, member: 18729"] Yes a hissing radiator is a different thing from a too-hot plug. The quote that has always stayed with me from that Gordon Jennings article I posted above is If it is fouling you’re trying to minimize then you have to pick a plug that is going to keep temps above the “self cleaning threshold temp” that Rich mentioned above. The advantage to the fine wire plug is that they require less voltage to form a spark. All things being equal (jetting, environmental factors) I would not think it has as much an effect on fouling – which is primarily a phenomenon whereby the insulator nose becomes coated with a foreign substance such as fuel, oil, or carbon and allows current to flow along the insulator surface instead of sparking across the air gap. You need to keep nose temps up to burn these deposits off. The BR8ES is marginal for that when you start plonking along tight single track (in my opinion). The BPR8ES that Rich mentioned is interesting and I may give it a try. That said, I have a lot of hours on BR7ES plugs and for me at least they are a better pick. I ran one last year at an enduro on 95 deg day with several WOT sections and it was fine (no pinging, no surging or other signs of preignition from a too-hot plug) – but that’s my engine (jetting, porting, fuel, etc) your experience could be different. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
'Correct' heat range
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