Crankshaft/Piston/Cylinder Service Information; Crankshaft/Piston/Cylinder Torque Values - Honda 2003 NPS50 Ruckus Service Manual

•
SERVICE INFORMATION
•
GENERAL
This section covers the crankcase separation to service the crankshaft, piston and cylinder.
The following parts must be removed before separating the crankcase.
- Oil pump (page 5-4)
- Water pump (page 7-8)
- Carburetor (page 6-7)
- Engine (page 8-4)
•
- Cylinder head (page 9-1 0)
•
- Drive pulley (page 1 0-9)
•
- Alternator/Starter (page 1 2-4)
Be careful not to damage the crankcase mating surfaces when separating and assembling the crankcase halves.
Take care not to damage the cylinder wall a n d piston.
Clean all disassembled parts with clean solvent and dry them using compressed a i r before inspection.
SPECIFICATIONS
Crankshaft Connecting rod side clearance
Connecting rod radial clearance
Runout
I.D.
Cylinder
Out-of-round
Taper
Warpage
Piston, Piston
piston ring,
Piston O.D. measurement point
piston pin
Piston pin bare
Piston pin O.D.
Piston-to-piston pin clearance
Piston ring-to-ring
groove clearance
Piston ring end gap
Cylinder-to-piston clearance
Connecting rod small end I. D.
Connecting rod-to-piston pin clearance
TORQUE VALUES
Crankcase bolt
Engine oil drain bolt
ITEM
0.0.
1.0.
T op
Second
Top
Second
Oil (side rail)
12 N·m (1.2 kgf·m, 9 lbf·ft
25 N·m (2.5 kgf·m, 18 lbf·ft)
CRANKSHAFT /PISTON/CYLINDER
ST ANDARD
0.10 0.40 (0.004- 0.016)
0.004 - 0.016 (0,0002 - 0.0006)
-
I
37.800 - 37.810 ( 1.4882 - 1.4886)
I
-
-
37.775 - 37.795 ( 1.4872 - 1.4880)
10 mm (0.39 in from bottom of skirt
)
10.002 - 10.008 (0.3938 - 0.3940)
9.994 - 10.000 (0.3935 - 0.3937)
0.002 - 0.014 (0.0001 - 0.0006)
0.020 - 0.050 (0.0008 - 0.0020)
0.01 5 - 0.050 (0.006 - 0.0020)
0.05 - 0. 1 5 (0.002 - 0.006)
0.05 0.17 (0.002 - 0.007)
0.1 0 - 0.60 (0.004- 0.024)
0.005 0.035 (0.0002 - 0.0014)
10.013 - 10.028 (0.3942 - 0.3948)
0.013 0.034 (0.0005 - 0.0013)
Apply oil to the threads and seating surface
)
Unit · mm
i n )
(
SERVICE LIMIT
0.60 (0.024)
0.05 (0.002)
0.10 (0.0039)
37.840 (1.4898)
0.05 (0.002)
0.05 (0.002)
0.05 (0.002)
37.72 (1.485)
10.04 (0.395)
9.98 (0.393)
I
0.04 (0.002)
I
0.08 (0.003)
0.08 (0.003)
0.40 (0.016)
0.40 (0.016)
0.80 (0.031 )
0.08 (0.003)
10.05 (0.396)
0.06 (0.002)
1 3-3