Yamaha 2008 YW50X Service Manual page 75

MA...E°A.OE SPEO.F.OA -.O° ISPEcl I
M A I N T E N A N C E SPECIFICATION
ENGINE
C y l i n d e r head:
Warp l i m i t "~
Item Sta nda rd Limit
*Lines indicate s t r a i g h t e d g e m e a s u r e m e n t
Cylinder:
Bore size
Taper l i m i t
40.000~40.014mm
(1.5748~1.5754 in)
Out of round Ih-nit
Piston:
Piston to c y l i n d e r clearance
Piston size " D "
M e a s u r i n g point " H "
Piston pin bore inside d i a m e t e r
Piston pin outside d i a m e t e r
Piston Ring:
Sectional Sketch (B × T)/'l-ype
Top Ring
2nd Ring
End Gap (Installed):
Top Ring
2nd Ring
Side Clearance ( Installed):
Top Ring
2nd Ring
I ~ Y l
0.035~0.040 m m
(0.0014~0.0016 in)
39.958~39.972 m m
(1.5731~1.5737 in)
5 mm(O.2 in)
10.004~10.015 m m
(0.3939~0.3943 in)
9.996~10.000 rnrn
(0.3935~0.3937 in)
1.2 × 1.6 m m / k e y s t o n e
(0.05 × 0.06 in)
1.2 × 1.6 r a m / k e y s t o n e
(0.05 × 0.06 in)
0.15~0.35 m m
(0.005~0.01 in)
0.15~0.35 m m
(0.005~0.01 in)
0.03~0.05 m m
(0.0012~0.0020 in)
0.03~0.05 m m
(0.0012~0.0020 in)
0.03 m m
(0.0012 in)
40.10 m m
(1.5787 in)
0.05 m m
(0.0020 in)
0.03 rnm
(0.0012 in)
0.10 m m
(0.0039 in)
10.045 m m
(0.4 in)
9.975 m m
(0.39 in)
0.6 mm(O.02 in)
0.6 mm(O.02 in)
0.1 mm(O.O039 in)
0.1 mm(O.O039 in)
2-4