KYMCO MXU 300 - SERVICE INFORMATION; TROUBLESHOOTING

11.CRANKSCASE/CRANKSHAFT/
BALANCE SHAFT
11-2
MXU 300/250
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 Unit: mm (in)
Ite
m
Standar
d
Service Limit
Connecting rod big end side clearance
0.05～0.4 (0.002～0.016) 0.6 (0.024)
Crankshaft Connecting rod big end radial clearance
0～0.008 (0～0.00032) 0.05 (0.002)
Run out
⎯ 0.1 (0.004)
TORQUE VALUES
Crankcase bolt 1 kgf-m (10 Nm, 7.2 lbf-ft)
Cam chain tensioner slipper bolt 1 kgf-m (10 Nm, 7.2 lbf-ft)
Cam chain cover bolt 1 kgf-m (10 Nm, 7.2 lbf-ft)
TROUBLESHOOTING
Excessive engine noise
Excessive bearing play