thomastomsk Posted September 26, 2009 Report Share Posted September 26, 2009 hi might seem like a daft question but what does it mean when the end of the spark plug is black and oily....i now surten states of the plug can mean different things just can not remember what.any info would be greatfull thanks. Quote Link to comment Share on other sites More sharing options...
jse Posted September 26, 2009 Report Share Posted September 26, 2009 hi might seem like a daft question but what does it mean when the end of the spark plug is black and oily....i now surten states of the plug can mean different things just can not remember what.any info would be greatfull thanks. It could mean that the jetting is too rich, the air cleaner is dirty, too much premix oil was accidently added to the fuel, the exhaust pipe has too much carbon in it, the mufflers somehow got clogged, the ignition system has low output, the carb float level is off or the float valve is not sealing well, things like that. Jon Quote Link to comment Share on other sites More sharing options...
thomastomsk Posted September 26, 2009 Author Report Share Posted September 26, 2009 i have just had the middle box welded up while it was split could this have cause it to blacken. Quote Link to comment Share on other sites More sharing options...
stork955 Posted September 26, 2009 Report Share Posted September 26, 2009 Gday, its unlikely thats the problem. Start with your air cleaner and go from there as Jon said above. Check carb related things first (after the air cleaner) and of course make sure you have the correct plug for your bike. Fresh fuel too. Cheers, Stork Quote Link to comment Share on other sites More sharing options...
thomastomsk Posted September 27, 2009 Author Report Share Posted September 27, 2009 thanks for all the info ,getting on with the job right now.once again thanks Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted September 27, 2009 Report Share Posted September 27, 2009 ...or you could be just riding slowly round your practice area and its just a bit rich from riding style. Does it look like this after a good blast up the road? Quote Link to comment Share on other sites More sharing options...
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