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2006 Yamaha V Star 1100 Classic - Page 9 Questions & Answers
EXHAUST PIPE IS DISCOLORED, WHAT CAN CAUSE THIS
Too lean condition heats up the pipes. Richen up the mixture to keep them cooler. To richen a mixture, if carburetor then turn air/fuel mixture counterclockwise in very small 1/4 turn increments. Not sure what vehicle you are referring to, but is the most common solution to the problem.
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