Engine; Spark Plugs; Fuel Line Inspection - Yamaha PZ50W Service Manual

SPARK PLUGS/FUEL LINE INSPECTION
1

ENGINE

SPARK PLUGS

1. Remove:
• Fuel tank
Refer to "SEAT AND FUEL TANK" in CHAP-
TER 5. (PZ50/PZ50GT/PZ50FX/PZ50M)
Refer to "RIDER SEAT AND FUEL TANK" in
CHAPTER 5. (PZ50VT/PZ50MP)
2. Remove:
• Spark plug caps
• Spark plugs
3. Inspect:
• Electrodes 1
Damage/wear → Replace the spark plug.
• Insulator color 2
Abnormal color → Replace the spark plug
Normal color is medium-to-light tan.
4. Measure:
• Spark plug gap a
Out of specification → Regap.
Use a wire thickness gauge.
Spark plug gap:
0.6 ~ 0.7 mm (0.024 ~ 0.028 in)
If necessary, clean the spark plugs with a spark
plug cleaner.
Standard spark plug:
NGK R CR9EKB (NGK)
Before installing a spark plug, clean the gasket sur-
face and spark plug surface.
5. Install:
• Spark plugs
Spark plug:
13 Nm (1.3 m · kg, 9.4 ft · lb)
NOTE:
Finger-tighten a the spark plug before torquing b
it to specification.

FUEL LINE INSPECTION

1. Remove:
• Headlight assembly (PZ50/PZ50GT/PZ50FX/
PZ50M)
Refer to "COWLINGS" in CHAPTER 3.
2. Inspect:
• Fuel hose 1
• Fuel return hose
Cracks/damage → Replace.
2-4
INSP
ADJ