Checking The Crankshaft - Yamaha 2004 YXR660 Service Manual

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.
M MMM
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).
L LLL
CAUTION:
The buffer boss and woodruff key should
be replaced when removed from the crank-
shaft.
4 - 77
ENG
Crank width
74.95 ~ 75.00 mm
(2.9508 ~ 2.9528 in)
Big end side clearance
0.35 ~ 0.65 mm
(0.0138 ~ 0.0256 in)
<Limit>: 1.0 mm (0.0394 in)
Runout limit
C1: 0.03 mm (0.0012 in)
C2: 0.03 mm (0.0012 in)
M MMM M M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L L LLL L
M MMM M MMM
L LLL L LLL