Yamaha YFM250XR Manuel Du Propriétaire page 282

a. Spark plug gap
a. Écartement des électrodes
a. Separación entre electrodos de la bujía
Before installing the spark plug, measure the elec-
trode gap with a feeler gauge and adjust to speci-
fication.
Spark plug gap:
0.6–0.7 mm
When installing the spark plug, always clean the
gasket surface and use a new gasket. Wipe off
any grime from the threads and tighten to the
specified torque.
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf)
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