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spark plug of motorcycle enter image description here

What does this plug tell about the inside operation of the engine? I can't find any plug that looks like this in any online charts.

CharlieRB
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Kamal
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2 Answers2

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Next time make a picture before you cleaned and sanded the plug, the color of the electrode can tell a lot about operating conditions.

To answer your question: it looks a bit fouled with oily deposits, so its possible the engine is running too rich.

MadMarky
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What kind of bike is this plug out of? Is it carbureted or fuel injected? As far as your fuel to air ratio, you can install new plugs and do a plug chop

Eric
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