Maintenance Specification; Engine - Yamaha YW50AP Service Manual

MAINTENANCE SPECIFICATION

ENGINE

Cylinder head:
Warp limit
*Lines indicate straightedge measurement
Cylinder:
Bore size
Taper limit
Out of round limit
Piston:
Piston to cylinder clearance
Piston size "D"
Measuring point "H"
Piston pin bore inside diameter
Piston pin outside diameter
Piston Ring:
Sectional Sketch (B × T)/Type
Top Ring
2nd Ring
End Gap (Installed):
Top Ring
2nd Ring
Side Clearance ( Installed):
Top Ring
2nd Ring
MAINTENANCE SPECIFICATION
Item
D
Standard
...
40.000~40.014mm
(1.5748~1.5754 in)
...
...
0.035~0.040 mm
(0.0014~0.0016 in)
39.958~39.972 mm
(1.5731~1.5737 in)
5 mm(0.2 in)
H
10.004~10.015 mm
(0.3939~0.3943 in)
9.996~10.000 mm
(0.3935~0.3937 in)
1.2 × 1.6 mm/ keystone
(0.05 × 0.06 in)
1.2 × 1.6 mm/ keystone
(0.05 × 0.06 in)
0.15~0.35 mm
(0.005~0.01 in)
0.15~0.35 mm
(0.005~0.01 in)
0.03~0.05 mm
(0.0012~0.0020 in)
0.03~0.05 mm
(0.0012~0.0020 in)
2-4
SPEC
Limit
0.03 mm
(0.0012 in)
40.10 mm
(1.5787 in)
0.05 mm
(0.0020 in)
0.03 mm
(0.0012 in)
0.10 mm
(0.0039 in)
...
...
10.045 mm
(0.4 in)
9.975 mm
(0.39 in)
0.6 mm(0.02 in)
0.6 mm(0.02 in)
0.1 mm(0.0039 in)
0.1 mm(0.0039 in)