4-68
CRANKCASE AND CRANKSHAFT
ENG
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.
Standard
<Limit>
Runout
0.03 mm
0.05 mm
limit:
(0.0012 in)
(0.0020 in)
Small end
0.4~1.0 mm
2.0 mm
free play:
(0.016~0.039 in)
(0.08 in)
Side 0.25~0.75
mm
—
clearance: (0.010~0.030in)
Crank 59.95~60.00
mm
—
width:
(2.360~2.362 in)
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.
2. Inspect:
9
Bearings
1
Rotate inner race with a finger.
Rough spot/Seizure
→
Replace.
3. Inspect:
9
Oil seal
1
Damage
→
Replace.
Dial gauge:
YU-3097/90890-01252
5NX-9-30-4C 6/5/01 4:26 PM Page 38
Summary of Contents for YZ250(P)/LC
Page 2: ......
Page 128: ...3 3 INSP ADJ MEMO...
Page 582: ...TUN MEMO...
Page 583: ......
Page 584: ......