MV Agusta Rivale 800, Workshop Manual

Page: 37 / 456

Maintenance
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B
Heat Grade
Check the heat grade of the spark plugs.
Sparks: - NGK CR9 EIB-9
DO NOT use non-resistive spark plugs.
Spark plug gap
If appropriate (see Technical Data table), measure the
spark gap with a thickness metre. Adjust the gap if
necessary on the basis of the following information:
Sparks Spark plug gap
NGK CR9 EIB-9 0.8 ÷ 0.9 mm
Electrode condition
Check the electrodes for wear or burning. If they are
extremely used or burnt, substitute the spark plugs.
Also substitute the spark plugs in the case of breakage
of the ceramic isolation or damage to threading.
When the spark plugs are renewed, check the
thread pitch size and the length of the thread. If
the threading is too short, carbon deposits will
be placed on the threading of the cylinder head
plughole thereby risking damage to the engine.
Manually insert the spark plugs into their seats to avoid
damage to the threading of the cylinder head. When
completely screwed in by hand, tighten to the specified
torque pressure.
Spark plugs torque pressure: 12 N·m
12 N•m