Discussion in 'Norton Motorcycles (Modern)' started by Britfan60, Apr 7, 2019.
Doesn't look lean .
Light brown/grey insulator.
Do you have a magnifying glass?
Look for tiny speckles of aluminum.
The red / brown color is most likely caused by MMT.
Although they have some black soot which is carbon fouled. This is caused by low speeds, a lot of idle time, dirty air filter or slightly to rich fuel.
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