2006-2008 Yamaha RS, Vector, Rage Factory Service Manual, Page 73Get this manual

2006-2008 Yamaha RS, Vector, Rage Factory Service Manual, Page 73

CARBURETOR TUNING INSP ADJ 3Check: Spark plug insulator color medium to light tan color indicates normal conditionsDistinctly
the condition of the spark plugs, it is easy to get some idea of the condition of the engineThis may diagnose potential problems
before engine damage occursHigh altitude tuning Use the chart in CHAPTER to select main jets according to variations in elevation