Yamaha BLASTER YFS200S Owner's Manual - page 112

1. Spark plug wrench

Inspection

The spark plug is an important engine compo-

nent and is easy to inspect. The condition of the

spark plug can indicate the condition of the

engine.

The ideal color on the white insulator around the

center electrode is a medium-to-light tan color

for a ATV that is being ridden normally.

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 replace the spark plug with the specified

plug.

a. Spark plug gap

8-9

Standard spark plug:

BR8ES (NGK) 

1

a

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