Crankshaft Assembly; Removing The Crankshaft Assembly; Checking The Crankshaft And Connecting Rod; Installing The Crankshaft Assembly - Yamaha XT250X Service Manual

EAS26000

REMOVING THE CRANKSHAFT ASSEMBLY

1. Remove:

Crankshaft assembly "1"

G
NOTE:
Remove the crankshaft assembly using crank-
shaft separating tool "2".
Crankcase separating tool
90890-01135
Crankcase separator
YU-01135-B
2. Remove:
Dowel pin "1"
G
Plunger pin "2"
G
Spring "3"
G
NOTE:
Slightly press the plunger pin and pull out the
dowel pin. Then, remove the plunger pin and the
spring.
EAS3C51014
CHECKING THE CRANKSHAFT AND
CONNECTING ROD
1. Measure:
Crankshaft runout
G
Out of specification → Replace the crank-
shaft assembly, bearing or both.
NOTE:
Turn the crankshaft slowly.
CRANKSHAFT ASSEMBLY
Runout limit C
0.030 mm (0.0012 in)
2. Measure:
Big end side clearance
G
Out of specification → Replace the crank-
shaft assembly.
Big end side clearance D
0.350–0.850 mm (0.0138–0.0335
in)
3. Measure:
Crankshaft width
G
Out of specification → Replace the crank-
shaft assembly.
Width A
69.25–69.30 mm (2.726–2.728 in)
4. Check:
Bearing
G
Cracks/damage/wear → Replace the crank-
shaft assembly.
5. Check:
Crankshaft journal oil passage
G
Obstruction → Blow out with compressed air.
EAS26210
INSTALLING THE CRANKSHAFT
ASSEMBLY
1. Install:
Spring "1"
G
Plunger pin "2"
G
Dowel pin "3"
G
NOTE:
Press the plunger pin by your fingers, and make
sure that it operates smoothly.
5-59