2003 2005 YFM45FAR, YFM450FAR Kodiak OEM Service Manual, Page 83Get this manual
CHECKING THE SPARK PLUG
CHECKING THE SPARK PLUG 1.Remove: Seat Fuel tank side panel (right) Refer to "SEAT, CARRIERS, FENDERS AND FUEL TANK"2.Remove: Spark plug 3.Check: Spark plug type Incorrect ReplaceStandard spark plug: DR8EANGK
4.Check: Electrode Weardamage ReplaceG Insulator Abnormal color ReplaceNormal color is medium-to-light tan color5.Clean the spark plug with spark plug cleaner or wire brush