Yamaha MZ250 Service Manual page 21

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PERIODIC MAINTENANCE
a
b
Feeler gauge set:
YU-26900-9
Thickness gauge:
90890-03180
Spark plug gap:
Refer to "SPECIFICATIONS" in
the Supplementary service
manual.
TIP
Before installing the spark plug, clean the gas-
ket surface and plug surface.
4. Install:
9 Spark plug
Spark plug:
Refer to "TIGHTENING TORQUES"
in the Supplementary service
manual.
TIP
To prevent threads from being damaged, tem-
porally tighten a the spark plug before tight-
ening it to the specified torque b.
2-4
CHK
ADJ

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