Yamaha YZF-R1 2020 Service Manual page 371

d
6. Lubricate:
• Piston
• Piston rings
• Cylinder
(with the recommended lubricant)
Recommended lubricant
Engine oil
7. Offset:
• Piston ring end gaps
b,e
a. Top ring
b. 2nd ring
c. Upper oil ring rail
d. Oil ring expander
e. Lower oil ring rail
A. Exhaust side
8. Lubricate:
• Crankshaft pins
• Connecting rod big end bearing inner surface
and side surface
(with the recommended lubricant)
Recommended lubricant
Engine oil
9. Install:
• Piston assemblies "1"
(into the cylinder "2")
1
d
a,c
CONNECTING RODS AND PISTONS
TIP
• While holding the piston rings with the hand, in-
stall the piston assembly into the cylinder from
underneath.
• Install the piston assembly into the cylinder so
that the piston ring end gap is aligned with the
cylinder skirt "a".
10.Install:
• Cylinder gasket
• Dowel pins
• Cylinder assembly
• Connecting rod caps
• Connecting rod bolts
TIP
• Make sure the " " marks "a" on the connecting
rods face towards the left side of the crank-
shaft.
• Make sure that the projection "b" on the con-
necting rod cap faces the same direction as the
" " mark "a" on the connecting rod.
b
11.Tighten:
• Connecting rod bolts "1"
5-88
1
a
2
New
a