PERIODIC MAINTENANCE AND MINOR REPAIR
6-5
6
EAU01486
Checking the spark plugs
The spark plugs are important engine
components, which are easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plugs should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
To remove a spark plug
1. Remove the appropriate spark
plug cover (rear right or front left)
by removing the screws.
2. Remove the spark plug cap.
3. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plugs
1. Check that the porcelain insulator
around the center electrode on
each spark plug is a medium-to-
light tan (the ideal color when the
motorcycle is ridden normally).
2. Check that all spark plugs installed
in the engine have the same color.
NOTE:
@
If any spark plug shows a distinctly dif-
ferent color, the engine could be defec-
tive. Do not attempt to diagnose such
problems yourself. Instead, have a
Yamaha dealer check the motorcycle.
@
3. Check each spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and replace
it if necessary.
1. Spark plug cover
2. Screw (
×
2)
1. Spark plug wrench
Specified spark plug:
BPR6ES (NGK) or
W20EPR-U (DENSO)
E_3bt.book Page 5 Thursday, September 7, 2000 10:01 AM
Summary of Contents for Virago XV535
Page 1: ...3BT 28199 E7 OWNER S MANUAL XV535 ...
Page 2: ...H_5KS_Toc0 fm Page 2 Monday August 21 2000 11 11 AM ...
Page 8: ...E_3bt book Page 2 Thursday September 7 2000 10 01 AM ...
Page 30: ...E_3bt book Page 3 Thursday September 7 2000 10 01 AM ...
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