Crankcase/Crankshaft - Service Information; Crankcase/Crankshaft Specifications; Crankcase/Crankshaft Troubleshooting - KYMCO DINK 125 Service Manual

11
. CRANKCASE/CRANKSHAFT
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
Connecting rod big end side clearance
Crankshaft Connecting rod big end radial clearance 0～0.008 (0～0.00032) 0.05 (0.002)
Runout
TORQUE VALUES
Crankcase bolt
Cam chain tensioner slipper bolt
TROUBLESHOOTING
Excessive engine noise
• Excessive bearing play
• Excessive crankpin bearing play
• Worn piston pin and piston pin hole
11-3
Item
1 kgf-m (10N-m, 7.2 lbf-ft)
1 kgf-m (10N-m, 7.2 lbf-ft)
Standard
0.15～0.35
(0.006～0.014)
⎯
DINK50/ 125
Unit: mm (in)
Service Limit
0.6 (0.024)
0.1 (0.004)