Yamaha RS90GTZ Service Manual page 306

CRANKSHAFT AND BALANCER SHAFT
6. Measure:
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification → Replace the crank-
shaft journal bearings.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance:
0.027 ~ 0.045 mm
(0.0011 ~ 0.0018 in)
Measurement steps:
NOTICE
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the
crankshaft journal
installed in their original positions.
• Clean the crankshaft journal bearings, crank-
shaft journals, and bearing portions of the
crankcase.
• Place the upper crankcase upside down on a
bench.
• Install the crankshaft journal upper bearings
and the crankshaft into the upper crank-
case.
TIP
Align the projections
nal upper bearings with the notches
crankcase.
• Put a piece of Plastigauge
crankshaft journal.
TIP
Do not put the Plastigauge
the crankshaft journal.
5-81
ENG
bearings must be
of the crankshaft jour-
in the
®
on each
®
over the oil hole in