Axle Boots; Spark Plug Inspection - Yamaha BIG BEAR 4X4 Owner's Manual

EBU00862

Axle boots

Check the protective boots for holes or tears.
If any damage is found, have them replaced
by a Yamaha dealer.
1. Boot (× 2)
1. Boot (× 2)
EBU00870*

Spark plug 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.
For example, a very white center electrode
porcelain color could indicate an intake air
leak or carburetion problem for that cylinder.
Do not attempt to diagnose such problems
yourself.
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 ex-
cessive, you should replace the spark plug
with one of the proper type.
Standard spark plug:
DR8EA (NGK)
8-13