Yamaha KODIAK ULTRAMATIC 4x4 Manual Del Propietário página 326

a. Spark plug gap
a. Écartement des électrodes
a. Huelgo de la bujía
Do not attempt to diagnose such problems your-
self. Instead, take the ATV to a Yamaha dealer.
You should periodically remove and inspect the
spark plug because heat and deposits will cause
the spark plug to slowly break down and erode. If
electrode erosion becomes excessive, or if carbon
and other deposits are excessive, you should re-
place the spark plug with the specified plug.
Specified spark plug:
DR8EA (NGK)
8-67