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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Spark Plug and Jetting
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[QUOTE="Rhodester, post: 1017136, member: 42241"] The only reason I'd change to a hotter plug is if my jetting was pretty close (but still on the safe side, ie. barely rich) and I had the insulator (main part of it including the tip) on the medium to dark side of things. That coloration on that part of the plug would indicate to me that my riding style was sedate enough to warrant a hotter heat range to clean things up. Please note, however, that I wouldn't be reading this area of the plug for determining my jetting. I'd be using the ring at the extreme base of the plug insulator for that. I don't jet by plug heat range. Another color might also show up in the tip area of the plug if I'm using pump gas (which I do). I'd get a brown or reddish brown color. That indicates additives in the pump gas. I wouldn't be concerned about that. If I ride aggressively enough the main body of the insulator will be fairly white (or light colored). Again, that area of the plug is not the proper indicator of your jetting unless (perhaps) you are way off in the woods somewhere in the jetting department. Get a new plug and do a proper plug chop test for jetting. [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Spark Plug and Jetting
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