Yamaha YDRA Owner's/Operator's Manual page 34

MAINTENANCE
1
2
3
4
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6
7
B
8
9
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7-4
A
Y-516
Y-37
Spark Plug Inspection
You should periodically remove and
inspect the spark plug. Dirty or
worn spark plugs can cause poor
performance.
When removing or installing the
spark plug, be careful not to
damage the insulator. A damaged
insulator could allow external
sparks, which could lead to
explosion or fire. Death or serious
personal injury can result from
failing to comply with the warning
labels in this manual.
å Spark plug
∫ Spark plug cap
1. Check for discoloration and remove
carbon deposits with a spark plug
cleaner or wire brush. The normal
electrode color will be tan.
2. Check the spark plug type, and
check the spark plug gap with a
feeler gauge.
Standard spark plug:
BPR2ES
Spark plug gap:
0.7 ˜ 0.8 mm (0.028 ˜ 0.031 in.)
å Gap
3. Clean the gasket and plug
surfaces and install the spark
plug finger-tight before tightening
to the following torque:
Spark plug torque:
20 Nm, 2.0 m . kg
(14.5 ft . lb)
JC2