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

EAS21030

CHECKING THE FUEL LINE

1. Remove:
• Storage box
Refer to "GENERAL CHASSIS" on page 4-1.
2. Check:
• Fuel hose "1"
Cracks/damage → Replace.
Loose connections → Connect properly.
3. Install:
• Storage box
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20690

CHECKING THE SPARK PLUG

1. Remove:
• Storage box
Refer to "GENERAL CHASSIS" on page 4-1.
• Spark plug cap
2. Remove:
• 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/DPR8EA-9
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.
PERIODIC MAINTENANCE
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.
1
7. Install:
• Spark plug
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Install:
• Spark plug cap
• Storage box
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20520

ADJUSTING THE VALVE CLEARANCE

The following procedure applies to all of the
valves.
TIP
• Valve clearance adjustment should be made
on a cold engine, at room temperature.
3-4
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
Spark plug
18 Nm (1.8 m·kgf, 13 ft·lbf)