Honda Activa SCV110, Service Manual Digest

Page: 144 / 230

12-1
12. CRANKCASE/CRANKSHAFT
SERVICE INFORMATION
GENERAL
• This section covers the crankcase separation to service the crankshaft.
• The engine must be removed from the frame to separate the crankcase.
• The following parts must be removed before separating the crankcase:
— air cleaner housing, carburetor (section 5)
— alternator (section 11)
— drive pulley, clutch/driven pulley (section 9)
— cylinder head (section 7)
— cylinder, piston (section 8)
• In addition to the parts listed above, remove the following parts when the left crankcase half must be replaced:
— final reduction (section 10)
— rear brake (section 14)
• Be careful not to damage the crankcase mating surfaces when separating and assembling the crankcase halves.
• The crankcase oil seals must be replaced with new ones when assembling the crankcase halves.
SPECIFICATIONS
Unit: mm (in)
SERVICE INFORMATION 12-1
TROUBLESHOOTING 12-1
CRANKCASE/CRANKSHAFT
DISASSEMBLY
12-2
CRANKSHAFT INSPECTION 12-4
CRANKSHAFT/CRANKCASE
ASSEMBLY
12-5
12
Connecting rod big end side clearance
Connecting rod big end radial clearance
Crankshaft runout
ITEM STANDARD
0.10 – 0.35 (0.004 – 0.014)
0 – 0.012 (0 – 0.0005)
—
SERVICE LIMIT
0.55 (0.022)
0.04 (0.002)
0.1 (0.04)
TORQUE VALUES
Cam chain tensioner pivot bolt 10 N·m (1.0 kgf·m, 7 lbf·ft)
Left crankcase bolt 13 N·m (1.3 kgf·m, 9 lbf·ft)
TROUBLESHOOTING
Abnormal engine noise
• Worn or damaged connecting rod bearing
• Worn or damaged crankshaft bearings