Yamaha WaveRunner VXR VX1800A, Service Manual

Page: 177 / 318

Crankcase, connecting rod, and piston
5-86
12. Install half of the crankshaft bearings “1”
into the cylinder block.
TIP:
• Install the crankshaft bearings “1” in their
original positions.
• Fit the protrusion “a” on each bearing into the
slots “b” in the cylinder block.
13. Install the crankshaft.
14. Replace the connecting rod bolt with a new
one.
Do not reuse a connecting rod bolt, always
replace it with a new one.
15. Lubricate the threads of the connecting rod
bolts with molybdenum disulfide grease.
16. Install the connecting rod cap “1” onto the
piston and connecting rod, keeping the
connecting rod bearings in their present
state.
TIP:
After installation, check that section “a” is flush
by running your finger across the surface.
17. Tighten the connecting rod bolts “2” to the
specified torques in 2 stages.
• When a connecting rod bolt is tightened
more than the specified angle, do not
loosen the connecting rod bolt and then
retighten it. Replace the connecting rod
bolt with a new one and perform the pro-
cedure again.
• If the mating surfaces between the con-
necting rod and connecting rod cap are
uneven, remove the connecting rod bolts
and connecting rod bearings, and then
perform the bearing installation proce-
dure again. In this case, make sure to re-
place the connecting rod bolts.
Crankcase assembly
1. Thoroughly clean all the gasket surfaces
and crankcase mating surfaces.
2. Install half of the crankshaft bearings “1”
into the crankcase.
TIP:
• Install the crankshaft bearings “1” in their
original positions.
• Fit the protrusion “a” on each bearing into the
slots “b” in the crankcase.
Piston ring compressor “1”
90890-05158
Piston ring compressor “1”
YM-08037
a
b
1
Connecting rod bolt “2”
1st: 51 Nm (5.1 kgf·m, 37.6 ft·lb)
2nd: 90°
1
2
2
a