Spark Plugs - Yamaha Virago XV535 Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
1
2
1. Cylinder head cover
2. Screw (´ 2)

Spark plugs

Removal
1. Remove the rear right and front
left cylinder head covers by re-
moving the screws.
2. Remove the spark plug caps.
1. Spark plug wrench
3. Use the spark plug wrench in the
EAU01486
tool kit to remove the spark plugs
as shown.
Inspection
The spark plug is an important engine
component and is easy to inspect. The
condition of the spark plug can indicate
the condition of the engine. Normally,
all spark plugs from the same engine
should have the same color on the
white insulator around the center elec-
trode. The ideal color at this point is a
medium-to-light tan color for a motor-
cycle that is being ridden normally. If
one spark plug shows a distinctly differ-
ent color, there could be something
wrong with the engine. Do not attempt
to diagnose such problems yourself. In-
1
stead, take the motorcycle to a
Yamaha dealer. You should periodical-
ly remove and inspect the spark plugs
because heat and deposits will cause
any spark plug to slowly break down
and erode. If electrode erosion be-
comes excessive, or if carbon and oth-
er deposits are excessive, you should
replace the spark plug with the speci-
fied plug.
6-5
Specified spark plug:
For CH:
BPR7ES (NGK) or
W22EPR-U (DENSO)
Except for CH:
BPR6ES (NGK) or
W20EPR-U (DENSO)