Yamaha TZ250M1 Owner's Service Manual page 177

CRANKCASE AND CRANKSHAFT
EC4N4213
Crankshaft
1. Inspect:
2. Inspect:
3. Measure:
A
Runout
limit
Small end
s
free play
Side
clearance (0.018~0.037 in)
Crank
width
EC4A4200
Push lever axle
1. Inspect:
4-79
• Bearing 1
Rotate outer race with a finger.
Rough spot/Seizure ≥ Replace.
• Oil seal 1
Wear/Damage ≥ Replace.
• Runout limit a
• Small end free play limit b
• Connecting rod big end side clearance c
• Crank width (crank pin side) d
Out of specification ≥ Replace.
Use the dial gauge and a thickness gauge.
Dial gauge:
YU-03097/90890-01252
Standard
0.03 mm
(0.0012 in)
0.8~1.0 mm
(0.031~0.039 in)
0.45~0.95 mm
49.975~50.025 mm
(1.968~1.969 in)
• Push lever axle 1
Wear/Damage ≥ Replace.
• Torsion spring 2
Broken/Damage ≥ Replace.
ENG
<Limit>
0.05 mm
(0.0020 in)
2.0 mm
(0.08 in)
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