11. Crank Case & Crank Shaft
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
Summary of Contents for AHG1
Page 3: ...1 Quick Reference 1 2 1 Engine Frame Serial Number Frame Serial Number Engine Serial Number ...
Page 14: ...1 Quick Reference 1 13 8 General Troubleshooting Engine lacks power 8 1 ...
Page 15: ...1 Quick Reference 1 14 ...
Page 16: ...1 Quick Reference 1 15 Engine will not stat or is hard to start 8 2 ...
Page 17: ...1 Quick Reference 1 16 Poor handling 8 3 ...
Page 18: ...1 Quick Reference 1 17 Poor performance at high speed 8 4 ...
Page 19: ...1 Quick Reference 1 18 Poor performance at low and idle speed 8 5 ...
Page 20: ...2 External components Exhaust pipe 2 0 2 ...
Page 21: ...2 External components Exhaust pipe 2 1 ...
Page 57: ...4 LUBRICATION SYSTEM 4 1 Lubrication System ...
Page 66: ...5 ENGINE 5 1 Engine 1 ENGINE REMOVAL INSTALLATION 4 1 1 Removal 4 1 2 Installation 6 ...
Page 73: ...6 CYLINDER HEAD VALVE 6 2 1 SCHEMATIC DRAWING ...
Page 87: ...7 CYLINDER PISTON 7 2 1 SCHEMATIC DRAWING ...
Page 97: ...8 DRIVE DRIVEN PULLEYS 8 2 1 SCHEMATIC DRAWING ...
Page 111: ...9 FINAL REDUCTION 9 2 1 SCHEMATIC DRAWING ...
Page 122: ...10 A C GENERATOR STARTER CLUTCH Downtown 125i 10 2 SCHEMATIC DRAWING ...
Page 130: ...11 Crank Case Crank Shaft 11 2 1 Schematic Drawing ...
Page 134: ...11 Crank Case Crank Shaft 11 6 Remove the oil seal from the left crankcase ...
Page 156: ...14 FRONT ASSEMBLY 14 2 1 SCHEMATIC DRAWING ...
Page 157: ...14 FRONT ASSEMBLY 14 3 ...
Page 176: ...15 REAR ASSEMBLY 15 2 1 SCHEMATIC DRAWING ...
Page 196: ...18 STARTING SYSTEM 18 2 1 Starting System Layout Battery Start Relay Start Motor ...
Page 224: ...20 ANTI LOCK BRAKE SYSTEM ABS 20 5 Pre diagnosis Inspection Chart 1 ...
Page 225: ...20 ANTI LOCK BRAKE SYSTEM ABS 20 6 Pre diagnosis Inspection Chart 2 ...