Checking The Fuel Line; Checking The Spark Plug; Adjusting The Valve Clearance - Yamaha RAPTOR YFM125RA Service Manual

EAS21030

CHECKING THE FUEL LINE

The following procedure applies to all of the
fuel and breather hoses.
1. Check:
• Fuel hose "1"
• Fuel tank breather hose "2"
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA14940
Make sure the fuel tank breather hose is
routed correctly.
EAS20690

CHECKING THE SPARK PLUG

1. Disconnect:
• Spark plug cap
2. Remove:
• Spark plug
ECA13330
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from fall-
ing into the cylinder.
3. Check:
• Spark plug type
Incorrect → Change.
Manufacturer/model
NGK/CR6HSA
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.
Spark plug gap
0.6–0.7 mm (0.024–0.028 in)
7. Install:
• Spark plug
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
TIP
Before installing the spark plug, clean the
spark plug and gasket surface.
8. Connect:
• Spark plug cap
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