Connecting Rod Big-End Oil Clearance - Yamaha F100A Service Manual

POWR
CRANKSHAFT AND PISTON/
CONNECTING ROD ASSY.
CAUTION:
The (*) mark indicates that the color of
the upper and lower bearings are differ-
ent. Install the main-bearings in the mid-
dle of the cylinder block and crankcase
journal so they do not block the oil holes.
NOTE:
Crankshaft bearing #3 is a thrust bearing.
If the difference between the cylinder
block journal diameter and crankshaft
journal diameter is more than the
maximum value (6.058 mm), replace
the crankshaft, cylinder block, or both.

Connecting rod big-end oil clearance

CAUTION:
Mark the original connecting rod bolts so
they are not confused with the new bolts.
Do not reuse the original connecting rod
bolts during assembly, only use them
when measuring and adjusting the oil
clearance.
Before assembly, remove any small metal
particles from the big- end mating surface
and also thoroughly clean it.
1. Measure:
Big-end oil clearance
Out of specification → Replace the
upper and lower bearings as a set.
Big-end oil clearance:
0.023 ~ 0.035 mm
(0.0009 ~ 0.0014 in)
NOTE:
Measure the big-end oil clearance at room
temperature (20 ˚C (68 ˚F)).
5-42
E