Yamaha Waverunner VXS VX1800, Service Manual

Page: 171 / 318

Crankcase, connecting rod, and piston
5-80
6. Before installing the connecting rod onto
the crankshaft, assemble the connecting
rod, which the connecting rod bearings
were installed in step 2, to the crankshaft
kept in the current condition.
TIP:
Tighten the connecting rod bolts while check-
ing that the sections shown “a” and “b” are
flush with each other by touching the surface.
7. Tighten the connecting rod bolts to the
specified torque.
8. Loosen the connecting rod bolts, remove
the connecting rod and connecting rod cap
and install these parts to the crankshaft
with the connecting rod bearings kept in
the current condition.
TIP:
• Make sure that the “Y” mark “a” on the con-
necting rod faces toward the timing chain
drive gear “b” of the crankshaft.
• After installation, check that the section “c” is
flush by running your finger across the sur-
face.
• Do not turn the connecting rod or crankshaft
until the crankshaft pin oil clearance mea-
surement has been completed.
9. Tighten the connecting rod bolts to the
specified torques in 2 stages.
10. Remove the connecting rod cap and mea-
sure the width “a” of the compressed Plas-
tigauge on each crankshaft pin. Replace
the connecting rod bearings if out of spec-
ification.
Connecting rod big end side
clearance check
1. Measure the connecting rod big end side
clearance “a”. Measure the connecting rod
big end width “b” and crankshaft pin width
“c” if out of specification.
Connecting rod bolt
30 Nm (3.0 kgf·m, 22.1 ft·lb)
a
b
Connecting rod bolt
1st: 51 Nm (5.1 kgf·m, 37.6 ft·lb)
2nd: 90°
Pin oil clearance
0.020–0.056 mm (0.0008–0.0022 in)
Limit
0.09 mm (0.0035 in)
YH
c
b
a
a