Spark Plug - Honda CBX250 Twister Owner's Manual

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Owner´s Manual

Spark Plug

(Refer to the Safety Precautions on page 43.)
Recommended plugs:
Standard: CR8EH – 9S (NGK)
For extended high speed riding:
CR9EH – 9S (NGK)
NOTICE
Never use a spark plug with an improper heat range.
Severe engine damage could result.
1. Disconnect the spark plug cap (1) from the spark plug.
2. Clean any dirt from around the spark plug base.
Remove the spark plug using the spark plug wrench
(2) furnished in the tool kit.
(2)
(1) Spark plug cap
(2) Spark plug wrench
(1)
3. Discard the spark plug.
4. With the plug washer attached, thread the spark
plug in by hand to prevent cross-threading.
5. Tighten the spark plug:
• If the old plug is good:
1/8 turn after it seats.
• If installing a new plug, tighten it twice to prevent
loosening:
a) First, tighten the plug:
NGK: 1/2 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.
6. Reinstall the spark plug cap.
51

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