Yamaha PZ50W Service Manual page 236

12. Measure:
Measurement steps:
Do not interchange the crankshaft journal bear-
ings. To obtain the correct crankshaft-journal-
to-crankshaft-journal-bearing
prevent engine damage, the crankshaft journal
bearings must be installed in their original posi-
tions.
• Clean the crankshaft journal bearings, crank-
• Place the upper crankcase upside down on a
• Install the crankshaft journal upper bearings 1
NOTE:
Align the projections a of the crankshaft journal
upper bearings with the notches b in the crank-
case.
• Put a piece of Plastigauge
2
NOTE:
Do not put the Plastigauge
crankshaft journal.
5-67
CRANKCASE
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification → Replace the crankshaft
journal bearings.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance:
0.020 ~ 0.044 mm
(0.0008 ~ 0.0017 in)
CAUTION:
shaft journals, and bearing portions of the
crankcase.
bench.
and the crankshaft into the upper crankcase.
shaft journal.
®
ENG
clearance and
®
2 on each crank-
over the oil hole in the