Yamaha YB50 - Crankshaft and Crankcase

MOT
ASSEMBLY AND ADJUSTMENT OF ENGINE
4-22
CRANKSHAFT AND CRANKCASE
1. Place:
• Crankshaft installation tool
2. Install:
• Crankshaft
(in left crankcase)
3. Install:
• Centring device
• Engine mounting spacer
4. Apply:
• Yamaha N.º 1215 adhesive on the
corresponding surfaces of both halves of
the crankcase
5. Place:
• Crankshaft installation tool
6. Install:
• Right crankcase
7. Tighten:
• Crankcase positioning screws
NOTE:
Tighten the crankcase positioning screws in
stages, using a crossed method for tighte-
ning.
8. Check:
• Rotation of crankshaft
Rough turning

Repair
9. Install:
• Oil seal catch plate 
Crankshaft installation tool:
: 90890-01411
: 90890-01274
: 90890-01275
: 90890-01277
Yamaha N. 1215 adhesive:
90890-85505
Crankshaft installation tool:
: 90890-01411
: 90890-01274
: 90890-01275
: 90890-01277
Crankcase screws
0.9 m • kg
Screw (oil seal catch plate)
0.9 m • kg