11. CRANKCASE/CRANKSHAFT 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
0.150.35
Connecting rod big end side clearance 0.6 (0.024)
(0.0060.014)
Crankshaft Connecting rod big end radial clearance 00.008 (00.00032) 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
11-3
