Checking The Fuel Line; Checking The Spark Plug; Adjusting The Valve Clearance - Yamaha MBK MW125 2014 Service Manual

EAS30619

CHECKING THE FUEL LINE

1. Remove:
• Center cover
• Storage box
Refer to "GENERAL CHASSIS (1)" on page
4-1 and "GENERAL CHASSIS (2)" on page
4-3.
2. Check:
• Fuel hose "1"
Cracks/damage → Replace.
Loose connections → Connect properly.
3. Install:
• Storage box
• Center cover
Refer to "GENERAL CHASSIS (1)" on page
4-1 and "GENERAL CHASSIS (2)" on page
4-3.
EAS30620

CHECKING THE SPARK PLUG

1. Remove:
• Center cover
Refer to "GENERAL CHASSIS (1)" on page
4-1.
2. Remove:
• Spark plug cap
• Spark plug
ECA13330
NOTICE
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from falling
into the cylinder.
3. Check:
• Spark plug type
Incorrect → Change.
Manufacturer/model
NGK/CR7E
4. Check:
• Electrode "1"
Damage/wear → Replace the spark plug.
1 5. Clean:
6. Measure:
7. Install:
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Install:
EAS30622

ADJUSTING THE VALVE CLEARANCE

The following procedure applies to all of the
valves.
3-4
PERIODIC MAINTENANCE
• Insulator "2"
Abnormal color → Replace the spark plug.
Normal color is medium-to-light tan.
• Spark plug
(with a spark plug cleaner or wire brush)
• Spark plug gap "a"
(with a wire thickness gauge)
Out of specification → Regap.
Spark plug gap
0.7–0.8 mm (0.028–0.031 in)
• Spark plug
• Spark plug cap
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
• Center cover
Refer to "GENERAL CHASSIS (1)" on page
4-1.