Sym MAXSYM 400i - Page 127

7. Cylinder / Piston
7-2
Precautions in Operation
General Information
 Both cylinder and piston service cannot be carried out when engine mounted on frame.
Specification Unit：mm
LX40A
Item
Standard
Limit
Cylinder
I.D.
82.995~83.015
83.100
Out of round
-
0.050
Taper
-
0.050
Warpage
-
0.050
Piston/
Piston
ring
Clearance
between
piston ring and
ring groove
Top
0.015~0.050
0.090
2
nd
0.015~0.050
0.090
Piston ring end
gap
Too
0.150~0.300
0.500
2
nd
0.300~0.450
0.650
Oil
(side rail)
0.200~0.700
-
Piston O.D. (2
nd
)
82.450~82.500
82.400
Clearance between piston
and cylinder
0.010~0.040
0.100
ID of piston pin boss
20.002~20.008
20.020
Piston pin O.D.
19.994~20.000
19.960
Clearance between piston and piston pin
0.002~0.014
0.020
Connecting rod small end I.D.
20.016~20.034
20.064
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