Checking The Starter Wheel; Checking The Starter Clutch; Checking The Timing Chain; Checking The Timing Chain Guide (Intake Side) - Yamaha MBK MW125 2014 Service Manual

EAS31236

CHECKING THE STARTER WHEEL

1. Check:
• Bearing
Damage/wear → Replace.
2. Check:
• Starter clutch idle gear
• Starter wheel
Burrs/chips/roughness/wear → Replace the
defective part(s).
3. Check:
• Starter wheel's contacting surfaces
Damage/pitting/wear → Replace the starter
wheel.
EAS30306

CHECKING THE STARTER CLUTCH

1. Check:
• Starter clutch operation
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Install the starter wheel "1" onto the starter
clutch "2" and hold the starter clutch.
b. When turning the starter wheel counterclock-
wise "A", the starter clutch and the starter
wheel should engage, otherwise the starter
clutch is faulty and must be replaced.
c. When turning the starter wheel clockwise "B",
it should turn freely, otherwise the starter
clutch is faulty and must be replaced.
▲ ▲▲▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
1
B
A
2
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
EAS31237

CHECKING THE TIMING CHAIN

1. Check:
• Timing chain
Damage/stiffness → Replace the timing
chain and camshaft sprocket as a set.
EAS31238
CHECKING THE TIMING CHAIN GUIDE
(INTAKE SIDE)
1. Check:
• Timing chain guide (intake side)
Damage/wear → Replace.
EAS30309

INSTALLING THE STARTER CLUTCH

1. Install:
• Oil seal "1"
(to the starter clutch cover)
▼▼▼
▲▲▲
5-48
STARTER CLUTCH
New
Installed depth "a"
1.0–1.5 mm (0.04–0.06 in)
a
1