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I 've noticed just in the few miles (10 miles ?) since I changed the plugs that the right pipe is getting a lot darker in color than the left which hasn't really changed ( a golden brown ) since I got it. I put new plugs in but haven't timed it, set the valves, or tuned the carbs. since I bought it. (maybe 50 miles) The left plug was carboned up while the right was brown and looked ok. Is the blueing pipe running hotter? Is this a problem?
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