Yamaha YFM660FS, Supplementary Service Manual

Page: 289 / 478

4 - 76
ENG
CRANKSHAFT AND OIL PUMP
CHECKING THE CRANKSHAFT
1.Measure:
●
Crank width
A
Out of specification
→
Replace the crank-
shaft.
●
Side clearance
D
Out of specification
→
Replace the crank-
shaft.
●
Runout
C
Out of specification
→
Replace the crank-
shaft.
*****************************************************
Crankshaft reassembling point:
The crankshaft
1
and the crank pin
2
oil pas-
sages must be properly interconnected with a
tolerance of less than 1 mm (0.04 in).
*****************************************************
CAUTION:
The buffer boss and woodruff key should
be replaced when removed from the crank-
shaft.
Crank width:
74.95 ~ 75.00 mm
(2.9508 ~ 2.9528 in)
Big end side clearance:
0.35 ~ 0.65mm
(0.0138 ~ 0.0256 in)
<Limit>: 1.0 mm (0.040 in)
Runout limit:
C1: 0.03 mm (0.0012 in)