Yamaha YZF-R15 Service Manual page 188

2. Install:
• Piston "1"
• Piston pin "2"
New
• Piston pin clips "3"
NOTE:
• Apply engine oil the piston pin.
• Make sure the arrow mark "a" on the piston
points towards the exhaust side of the cylinder.
• Before installing the piston pin clip, cover the
crankcase opening with a clean rag to prevent
the clip from falling into the crankcase.
a
3. Lubricate:
• Piston
• Piston rings
• Cylinder
(with the recommended lubricant)
Recommended lubricant
Engine oil
4. Offset:
• Piston ring end gaps
a. T op ring
b. Oil ring expander
c. Upper oil ring rail
d. Lower oil ring rail
e. 2nd ring
A. exhaust side
5. Install:
• Dowel pins
• Cylinder head gasket
• Cylinder "1"
NOTE:
• While compressing the piston rings with one
hand, install the cylinder with the other hand.
1
• Pass the timing chain and timing chain guide
2
(intake side) through the timing chain cavity.
3 New
5-26
CYLINDER AND PISTON
e a
120º
b
120º
120º
90º
c
d
45º 45º
A
New
1