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Reply to "Color of the soot in the end of the exhaust"

Ya know, it's a little more trouble, but over here in the USA, we pull the plugs and take a look at the color they're burning at. Chocolate brown is ideal, black is rich and grey is lean.

Considering the cost of an engine, we just go ahead and uncrew a plug and have a look.

That's voodoo, just wiping the exhaust tips with your finger and adjusting the carb(s) like that!

May as well adjust the carbs by how much smoke is coming from the exhaust pipes under full acceleration, too much smoke, rich, no smoke, lean.

Pull a plug, it doesn't take that much time!
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