Honda NU50 - Crankcase;Crankshaft Service Info and Troubleshooting

CRANKCASE/CRANKSHAFT
ri/)HON'DA
10.
NUSO·NUSOM
SERVICE INFORMATION
10-1
TROUBLESHOOTING 10-1
CRANKCASE SEPARATION
10-2
CRANKSHAFT REMOVAL 10-3
CRANKSHAFT INSPECTION
CRANKCASE ASSEMBLY
10-3
10-5
SERVICE INFORMATION
GENERAL
- The lollow"'9 parts musll)e removed before separating the crankcase:
Engine
- Mounting bracket
- Genter stand
Oil pump
Reed valve
KIck Slaner driven gear
Alternator
Cylinder head, cylinder
Page 5-2
Page 2-5
Page 4·9
PageS·l1.17
Page 7-2
Page 6-2, 3
. In addition 10 the above, remove the following parts when the left crankcase halve must be replaced:
Rear wheel
Final reduction
SPECIFICATIONS
Page 12-2
Page 9·2
-.--
__ ._n __ . ITEM
.
STANDAf!!? __ ~m (in)
SERVICE LIMIT mOl (inl
CONNECTING ROD BIG END SIDE
0.60 (0.024)
CLEARANCE
CONNECTING ROD BIG END RADIAL
CLEARANCE
0.05/0.002)
CRANKSHAFT RUNQUT A
0.15 (0.0061
B
0.10 (O.OO4J
I
TOOLS
$ped,1l
Crankcase Puller
seal And Case Assembling Tool
Bearing Remover \
Common
Attachment. 42 x 47 mm
Pilot, 20 mm
Driver
Bearing Remover Handle
Bearing Remover Weight
TROUBLESHOOTING
07935-1870000 or modified 07933-1470000
07965-1480010
07936-3710600
07746-0010300
07746-0040500
07749-0010000
07936-3710100
07936-3710200
Abnormal engine noise
1. Worn main journal bearing
Date of Issue: Nov., 1981
© HONDA MOTOR CO., lTD.
2. Worn crankpin bearing
99
3. Worn transmission bearing
10-1