Checking The Fuel Line; Checking The Spark Plugs; Adjusting The Valve Clearance - Yamaha XVS950CU 2014 Service Manual

EAS21030

CHECKING THE FUEL LINE

The following procedure applies to all of the fuel
and breather hoses.
1. Remove:
• Fuel tank
Refer to "FUEL TANK" on page 6-1.
2. Check:
• Fuel hoses "1"
• Fuel return hose "2"
• Fuel tank breather/overflow hose "3"
Cracks/damage → Replace.
Loose connection → Connect properly.
ECA1TP1012
NOTICE
Make sure the fuel tank breather hose are
routed correctly.
2
3. Install:
• Fuel tank
Refer to "FUEL TANK" on page 6-1.
EAS20680

CHECKING THE SPARK PLUGS

The following procedure applies to all of the
spark plugs.
1. Remove:
• Rear cylinder right cover
Refer to "ENGINE REMOVAL" on page 5-3.
2. Disconnect:
• Spark plug cap
3. Remove:
• Spark plug
ECA13320
NOTICE
Before removing the spark plugs, blow away
any dirt accumulated in the spark plug wells
with compressed air to prevent it from falling
into the cylinders.
4. Check:
• Spark plug type
Incorrect → Change.
Manufacturer/model
NGK/CPR7EA-9
3
1
PERIODIC MAINTENANCE
5. Check:
• Electrode
Damage/wear → Replace the spark plug.
• Insulator
Abnormal color → Replace the spark plug.
Normal color is medium-to-light tan.
6. Clean:
• Spark plug
(with a spark plug cleaner or wire brush)
7. Measure:
• Spark plug gap "a"
(with a wire thickness gauge)
Out of specification → Regap.
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
a
8. 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.
9. Connect:
• Spark plug cap
10.Install:
• Rear cylinder right cover
Refer to "ENGINE REMOVAL" on page 5-3.
EAS20530

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.
• When the valve clearance is to be measured or
adjusted, the piston must be at top dead center
(TDC) on the compression stroke.
3-4