Checking The Oil Strainer; Checking The Crankshaft - Yamaha YXR70FX Service Manual

CRANKSHAFT AND OIL PUMP
d
c c
a

CHECKING THE OIL STRAINER

1. Check:
• oil strainer
Damage → Replace.
Contaminants → Clean with engine oil.
EBS00360

CHECKING THE CRANKSHAFT

1. Measure:
• crank width a
Out of specification → Replace the crank-
shaft.
Crank width
74.95 ~ 75.00 mm
(2.951 ~ 2.953 in)
2. Measure:
• side clearance d
Out of specification → Replace the crank-
shaft.
Big end side clearance
0.350 ~ 0.650 mm
(0.0138 ~ 0.0256 in)
<Limit>: 1.0 mm (0.04 in)
3. Measure:
• runout c
Out of specification → Replace the crank-
shaft.
Runout limit
0.030 mm (0.0012 in)
4 - 80
ENG