Valve Clearance - Honda XR250 Tornado 2016 Owner's Manual

XR250 TORNADO
6. With the plug washer attached, thread the spark
plug in by hand to prevent cross-threading.
7. Tighten the spark plug:
If the old plug is good:
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1/8 turn after it seats.
If installing a new plug, tighten it twice to prevent
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loosening:
a) First, tighten the plug:
NGK: 3/4 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
NOTICE
Improperly tightened spark plug can damage the
engine. If a plug is too loose, a piston may be
damaged. If a plug is too tight, the threads may be
damaged.
8. Reinstall the spark plug cap. Take care to avoid
pinching any cables or wires.

Valve Clearance

(Refer to the Safety Precautions on page 55.)
Valve clearance should be inspected and adjusted
according to the intervals specified in the Maintenance
Schedule (page 56).
See an authorized Honda dealer to have the valves
inspected and adjusted.
NOTICE
It is necessary to use a measuring device to perform
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this service.
Excessive valve clearance will cause engine noise.
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Little or no clearance may damage the valves or
cause power loss.
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