Yamaha F400A 2022 - Page 393

Cylinder block
7-93
TIP:
• Install the crankshaft journal bearings “1” in
their original positions.
• Install the crankshaft journal bearings “1”
according to the specified dimensions.
4. Install:
• Oil seal (upper)
• Oil seal (lower)
•Crankshaft
• Thrust bearings (cylinder block side) “1”
TIP:
• Install each thrust bearing with its grooves
facing outward.
• Slide the thrust bearing between the crank-
shaft and the cylinder block.
5. Install:
• Crankshaft pin bearings
(into the connecting rod and connecting
rod cap)
TIP:
Install the crankshaft pin bearings in the origi-
nal positions.
6. Install:
•Pistons
TIP:
• Apply engine oil to the side of the piston, pis-
ton rings, and cylinder wall.
• Install the piston so that the mark “a” on the
piston crown is facing toward the flywheel
magneto end of the crankshaft.
7. Install:
• Connecting rod caps
• Connecting rod bolts
a. Install the connecting rod caps “1” to
the connecting rods.
TIP:
Make sure that the protrusion “a” on the con-
necting rod caps “1” is facing toward the fly-
wheel magneto end “b” of the crankshaft.
b. Tighten new connecting rod bolts “2”
to the specified torques in 3 stages.
Distance “a”
0.65–1.25 mm (0.026–0.049 in)
Distance “b”
0.95–1.55 mm (0.037–0.061 in)
1
1
1
1
1
b b a
EE
New
New
1
Piston slider 96 mm “1”
90890-06684
Piston slider 96 mm “1”
YB-06684
a
1
New