Service Information; Troubleshooting - KYMCO Downtown 125i 2009 Service Manual

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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
Cylinder/piston
Drive and driven pulley
A.C. generator/starter clutch
Rear wheel/rear shock absorber
Starter motor ( chapter 19 )
Oil pump ( chapter 4 )
SPECIFICATIONS
Connecting rod big end side clearance
Crankshaft
Connecting rod big end radial clearance
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
Cortesia de/ Courtesy of: www.batmotos.com
( chapter 7 )
( chapter 8 )
( chapter 10 )
( chapter 16 )
Item
1.0 kgf-m
1.0 kgf-m
DOWNTOWN 125i
Unit: mm
Standard
0.15～0.35
0～0.008
11-2