NSR 150 SP Owner's Manual: Spark Plug

SPARK PLUG

(Refer to the maintenance precaution)

Recommended plugs:

Standard: B9ECS (NGK)

1.    Disconnect the spark plug cap from the spark plug.

2.    Clean any dirt from around the spark plug base. Remove the spark plug using the plug wrench furnished in the tool kit

3.    Inspect the electrode and center porcelain for deposes, erosion or carbon fouling. If the erosion or deposit is heavy, replace the plug. Clean a carbon or wet-fouled plug with a plug cleaner, otherwise use a wire brush.

4.    Check the spark plug gap (1) using a wire type feeler gauge. If adjustment is necessary, bend the side electrode (2) carefully. The gap should be: 0.7-0.8 mm (0.028-0.031 in). Make sure the plug washer is in good condition.

5.    With the plug washer attached, thread the spark plug in by hand to prevent cross threading.

6.    Tighten a new spark plug 1/2 turn with a spark plug wrench to compress the washer. If you are reusing a plug, it should only take 1/8-1/4 turn after the plug seat.

7.    Reinstall the spark plug cap.

CAUTION:

The spark plug must be securely tightened. An improperly tightened plug can become very hot and possibly damage the engine. Never use a spark plug with an improper heat range. Severe engine damage could result.