KYMCO Mongoose/KXR 250

11.CRANKSCASE/CRANKSHAFT/
BALANCE SHAFT
11-2
Mongoose/KXR 250
SERVICE INFORMATION
GENERAL INSTRUCTIONS
• This section covers crankcase separation to service the crankshaft. The engine must be removed
for this operation.
• The following parts must be removed before separating the crankcase.
−Cylinder head (
Ö
Chapter 7)
−Cylinder/piston (
Ö
Chapter 8)
−Drive and driven pulleys (
Ö
Chapter 9)
−A.C. generator (
Ö
Chapter 16)
−Starter clutch (
Ö
Chapter 18)
−Oil pump (
Ö
Chapter 4)
SPECIFICATIONS
Ite
m
Standard (mm) Service Limit (mm)
Connecting rod big end side clearance
0.05～0.4 0.6
Crankshaft Connecting rod big end radial clearance
0～0.008 0.05
Run out
⎯ 0.10
TORQUE VALUES
Crankcase bolt 0.8～1.2kgf-m
Cam chain tensioner slipper bolt 0.8～1.2kgf-m
Cam chain cover bolt 0.8～1.2kgf-m
TROUBLESHOOTING
Excessive engine noise
Excessive bearing play