KYMCO Dink 50, Service Manual

Page: 234 / 424

11
. CRANKCASE/CRANKSHAFT
11-3
DINK50/ 125
SERVICE INFORMATION
GENERAL INSTRUCTIONS
•
This section covers crankcase separation to service the crankshaft. The engine must be removed
for this operation.
•
When separating the crankcase, never use a driver to pry the crankcase mating surfaces apart
forcedly to prevent damaging the mating surfaces.
•
When installing the crankcase, do not use an iron hammer to tap it.
•
The following parts must be removed before separating the crankcase.
Cylinder head (chapter 6)
Cylinder/piston (chapter 7)
Drive and driven pulley (chapter 8)
A.C. generator/starter clutch (chapter 10)
Rear wheel/rear shock absorber (chapter 15)
Starter motor (chapter 18)
Oil pump (chapter 4)
SPECIFICATIONS Unit: mm (in)
Item
Standard Service Limit
Connecting rod big end side clearance
0.15
～
0.35
(0.006
～
0.014)
0.6 (0.024)
Crankshaft Connecting rod big end radial clearance 0
～
0.008 (0
～
0.00032) 0.05 (0.002)
Runout
⎯
0.1 (0.004)
TORQUE VALUES
Crankcase bolt 1 kgf-m (10N-m, 7.2 lbf-ft)
Cam chain tensioner slipper bolt 1 kgf-m (10N-m, 7.2 lbf-ft)
TROUBLESHOOTING
Excessive engine noise
•
Excessive bearing play
•
Excessive crankpin bearing play
•
Worn piston pin and piston pin hole