Yamaha TZ250M1 Owner's Service Manual page 176

CRANKCASE AND CRANKSHAFT
EC4N3000
REMOVAL POINTS
EC4N3230
Crankcase
1. Remove:
NOTE:
• The M6 size bolts should be removed first.
• Loosen the bolts from the outer sides inward.
2. Remove:
C C CAUTION:
Use soft hammer to tap on the case half.
Tap only on reinforced portions of case. Do
not tap on gasket mating surface. Work
slowly and carefully. If the cases do not
separate, check for a remaining case screw
or fitting. Do not force.
EC4N3410
Crankshaft bearing
1. Remove:
NOTE:
• Remove the bearing from the crankshaft
• Do not use the removed bearing.
EC4N4000
INSPECTION
EC4N4112
Crankcase
1. Inspect:
4-78
• Bolt [crankcase (M6)] 1
• Bolt [crankcase (M8)] 2
• Crankcase (upper) 1
From crankcase (lower) 2.
• Bearing 1
using a general bearing puller 2.
• Contacting surface a
Scratches ≥ Replace crankcase assembly.
• Engine mounting boss b, crankcase
Cracks/Damage ≥ Replace crankcase
assembly.
ENG