KYMCO AHG5, Руководство по обслуживанию

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11. CRANK CASE
DT X360
11-3
2. SERVICE INFORMATION
2.1. 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
-
Oil pump
2.2. Specifications
Unit: mm
Item Standard Service Limit
Crankshaft
Connecting rod big end side clearance
0.15
～
0.35
0.6
Connecting rod big end radial clearance
0
～
0.008
0.05
Run out --- 0.1
2.3. Torque Values
Crankcase bolt 0.8~1.2 kgf-m
Cam chain tensioner pivot 0.8~1.2 kgf-m
2.4. Troubleshooting
Excessive engine noise

Excessive bearing play

Excessive crankpin bearing play

Worn piston pin and piston pin hole