Checking The Fuel Line; Adjusting The Valve Clearance - Yamaha Wolverine YX70EPNG Service Manual

EBS30027

CHECKING THE FUEL LINE

1. Remove:
• Rear panel (right)
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Under-seat storage compartment
Refer to "GENERAL CHASSIS (3)" on page
4-6.
2. Check:
• Fuel hose "1"
Cracks/damage → Replace.
Loose connection → Connect properly.
3. Install:
• Under-seat storage compartment
Refer to "GENERAL CHASSIS (3)" on page
4-6.
• Rear panel (right)
Refer to "GENERAL CHASSIS (1)" on page
4-1.
EBS30028

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.
1. Remove:
• Frame cross member
Refer to "GENERAL CHASSIS (9)" on page
4-19.
2. Disconnect:
• Cylinder head breather hose
Refer to "THROTTLE BODY" on page 7-8.
• Spark plug cap
Refer to "CAMSHAFTS" on page 5-10.
3. Remove:
• Spark plug
1
PERIODIC MAINTENANCE
• Cylinder head cover
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.
4. Remove:
• Crankshaft end accessing screw "1"
5. Measure:
• Valve clearance
Out of specification → Adjust.
Valve clearance (cold)
Intake
0.10–0.20 mm (0.0039–0.0079 in)
Exhaust
0.22–0.32 mm (0.0087–0.0126 in)
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Turn the crankshaft counterclockwise.
b. Position the holes "a" in the intake camshaft
sprocket and exhaust camshaft sprocket
above the cylinder head mating surface "b"
as shown in the illustration, and align the
marks "c"on the sprockets with the cylinder
head mating surface "b".
a
c
c. Measure the valve clearance with a thickness
gauge "1".
3-3
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
c c a
1
▼▼▼
c
b