1994-2001 Yamaha Venture/V-Max 500 Series Snowmobile Service Manual, Page 389Get this manual

1994-2001 Yamaha Venture/V-Max 500 Series Snowmobile Service Manual, Page 389

CARBURETOR TUNING 3Check: Spark plug insulator CD color medium to light tan color indicates normal conditionsDistinctly different
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 occurs High altitude tuning Use the chart in CHAPTER to select main jets according to variations in