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