Removing The Crankshaft Assembly; Checking The Crankshaft - Yamaha YJ50RAP Service Manual

1
EAS00388
REMOVING THE CRANKSHAFT
ASSEMBLY
1. Remove:
• crankshaft assembly 1
NOTE:
@
• Remove the crankshaft assembly with the
crankcase separating tool 2.
2
• Make sure the crankcase separating tool is
centered over the crankshaft assembly.
EAS00394

CHECKING THE CRANKSHAFT

1. Measure:
• crankshaft runout 1
Out of specification → Replace the crank-
shaft, bearing(s) or both.
NOTE:
@
Turn the crankshaft slowly.
2. Measure:
• big end side clearance 2
Out of specification → Replace the big end
bearing, crankshaft pin, or connecting rod.
3. Measure:
• crankshaft width 3
Out of specification → Replace the crank-
shaft.
5 - 43
CRANKSHAFT
Crankcase separating tool
YU-01135
Maximum crankshaft runout
0.03 mm (0.0012 in)
Big end side clearance
0.35 ~ 0.75 mm
(0.0138 ~ 0.0295 in)
<Limit>: 1 mm (0.0394 in)
Crankshaft width
37.90 ~ 37.95 mm (1.492 ~ 1.494 in)
ENG