Yamaha MBK MW125 2014, Service Manual

Page: 85 / 380

PERIODIC MAINTENANCE
3-4
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
NOTICE
ECA13330
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.
4. Check:
• Electrode “1”
Damage/wear
→
Replace the spark plug.
• Insulator “2”
Abnormal color
→
Replace the spark plug.
Normal color is medium-to-light tan.
5. Clean:
• Spark plug
(with a spark plug cleaner or wire brush)
6. Measure:
• Spark plug gap “a”
(with a wire thickness gauge)
Out of specification
→
Regap.
7. Install:
• Spark plug
• Spark plug cap
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Install:
• Center cover
Refer to “GENERAL CHASSIS (1)” on page
4-1.
EAS30622
ADJUSTING THE VALVE CLEARANCE
The following procedure applies to all of the
valves.
Manufacturer/model
NGK/CR7E
1
Spark plug gap
0.7–0.8 mm (0.028–0.031 in)
T
R
.
.
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)