Yamaha MT-03 Service Manual page 226

2. Install:
• Piston "1"
• Piston pin "2"
• Piston pin clips "3"
NOTE:
• Apply engine oil to the piston pin.
• Make sure the punch mark a on the piston
points towards the exhaust side of the cylin-
der.
• Before installing the piston pin clips, cover the
crankcase opening with a clean rag to pre-
vent the clip from falling into the crankcase.
1
a
3. Install:
• Cylinder gasket
New
• Dowel pins
4. Lubricate:
• Piston
• Piston rings
• Cylinder
(with the recommended lubricant)
Recommended lubricant
Engine oil
New
2
New
3
CYLINDER AND PISTON
5. Offset:
• piston ring end gaps
a. Top ring
b. Upper oil ring rail
c. Oil ring expander
d. Lower oil ring rail
e. 2 nd ring
f. 20 mm (0.79 in)
å Exhaust side
e
120¡
6. Install:
• Cylinder "1"
• Timing chain guide (exhaust)
NOTE:
• While compressing the piston rings with one
hand, install the cylinder with the other hand.
• Pass the timing chain and timing chain guide
(exhaust side) through the timing chain cavity.
1
7. Install:
• Washers
New
• Cylinder bolts
NOTE:
• Lubricate the cylinder bolt threads and muting
surface with engine oil.
• Install the washers with their blunt surface
facing up.
5-31
120¡
a
120¡
f f
d b
c
A