Honda CRF250F Owner's Manual Installation And Operation page 187

SPARK PLUG
Refer to the Safety Precautions on page 43.
Recommended plug:
LMAR7H-9DS (NGK)
Never use a spark plug with an improper
heat range. Severe engine damage could
result.
62
1. Disconnect the spark plug cap (1) from
the spark plug.
2. Clean any dirt from around the spark
plug base.
3. Remove the spark plug with the spark
plug wrench (2) and screwdriver (3)
provided in the tool bag.
(1)
(2)
(1) Spark plug cap
(2) Spark plug wrench
(3) Screwdriver
(3)