Yamaha YZ250T1 Owner's Service Manual page 157

CRANKCASE AND CRANKSHAFT
4-68
EC4N4202
Crankshaft
1. Measure:
9 Runout limit a
9 Small end free play limit b
9 Connecting rod big end side clearance c
9 Crank width d
Out of specification ¡ Replace.
Use the dial gauge and a thickness gauge.
Dial gauge:
YU-3097/90890-01252
Standard
Runout 0.03 mm
limit: (0.0012 in)
Small end 0.4~1.0 mm
free play: (0.016~0.039 in)
Side 0.25~0.75 mm
clearance: (0.010~0.030in)
Crank 59.95~60.00 mm
width: (2.360~2.362 in)
EC4N5000
ASSEMBLY AND INSTALLATION
EC4N5300
Crankshaft bearing
1. Install:
9 Bearing 1
To crankcase (left and right).
NOTE:
Install the bearing by pressing its outer race
parallel.
EC4N5102
Oil seal
1. Install:
9 Oil seal (left) 1
9 Oil seal (right) 2
NOTE:
9 Apply the lithium soap base grease on the oil
seal lip.
9 Install the oil seal with its manufacture's marks
or numbers facing outward.
ENG
<Limit>
0.05 mm
(0.0020 in)
2.0 mm
(0.08 in)
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