Checking The Spark Plug; Checking The Breather Hose - Yamaha Wolverine YX70EPNG Service Manual

Cylinder head cover bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Spark plug (new)
11 Nm (1.1 m·kgf, 8.0 ft·lbf)
Spark plug (reused)
Specified angle 30–45°
10.Connect:
• Spark plug cap
Refer to "THROTTLE BODY" on page 7-8.
• Cylinder head breather hose
Refer to "THROTTLE BODY" on page 7-8.
11.Install:
• Frame cross member
Refer to "GENERAL CHASSIS (9)" on page
4-19.
EBS30029

CHECKING THE SPARK PLUG

1. Disconnect:
• Spark plug cap
Refer to "CAMSHAFTS" on page 5-10.
2. Remove:
• Spark plug
Refer to "CAMSHAFTS" on page 5-10.
ECB01270
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/CPR7EA-9
4. Check:
• Electrodes "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.
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
PERIODIC MAINTENANCE
7. Install:
• Spark plug
Spark plug (new)
11 Nm (1.1 m·kgf, 8.0 ft·lbf)
Spark plug (reused)
Specified angle 30–45°
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
8. Connect:
• Spark plug cap
EBS30030

CHECKING THE BREATHER HOSE

1. Remove:
• Center storage compartment
Refer to "GENERAL CHASSIS (3)" on page
4-6.
• Rear panel (right)
Refer to "GENERAL CHASSIS (1)" on page
4-1.
2. Check:
• Cylinder head breather hose "1"
• Throttle body breather hose "2"
Cracks/damage → Replace.
Loose connection → Connect properly.
ECB01680
NOTICE
Make sure the cylinder head breather hose is
routed correctly.
3-6
2
1