Crankcase/Crankshaft Service Information; Crankcase/Crankshaft Troubleshooting; Crankcase/Crankshaft Specifications; Crankcase/Crankshaft Torque Values - Honda CH250 Elite 1986 Service Manual

11. CRANKCASE/CR·ANKSHAfT
SERVICE INFORMATION
TROUBLESHOOTING
CRANKCASE SEPARATION
SERVICE INFORMAllON
GENERAL
11-1
11-1
11-2
CRANKSHAFT INSPECTION
CRANKCASE ASSEMBLY
11-3
11-4
• This section covers crankcase separation to service the crankshaft.
• The following parts must be removed before separating the crankcase.
Engine Section 5
Cylinder head Section 6
Cylinder/piston Section 7
Drive and driven pulleys Section 8
Alternator/starter driven gear
Section 10
Starter motor Section 16
'Ifth~crankshaft
sprocket or timing sprocket need replacement, the crankshaft assembly must
b~replacetl:
SPECIFICATIONS
> ..
STANDARD mm Onl
SERVICE LIMIT mm (in)
Connecting rod big end side clearance
0.05-0.4 (0.002-0.016) 0.6 (0.02)
Connecting rod big end radial clearance
0-0.008 (0-0.0004) 0.05 (0.0021
Crankshaft runout
--
0.10 (0.004)
TORQUE VALUE
•
Crankcase bolt
TROUBLESHOOTING
Excessive engine noise
• Excessive bearing play
• Excessive crankpin bearing play
• Worn piston pin and piston pin hole
8-12 N'm (0.8-1.2 kg-m,
6-~
ft-Ibl
11-1