Yamaha YP400T Service Manual page 39

Item
Winding direction (top view)
Intake
Exhaust
Cylinder
Cylinder arrangement
Bore × stroke
Compression ratio
Bore
Maximum taper
Piston
Piston-to-cylinder clearance
Diameter D
D
Height H
Piston pin bore (in the piston)
Diameter
Offset
Offset direction
Piston pin
Outside diameter
Piston-pin-to-piston-pin-bore clear-
ance
Piston rings
Top ring
Ring type
Dimensions (B × T)
End gap (installed)
Ring side clearance
ENGINE SPECIFICATIONS
Clockwise
Clockwise
Forward-inclined single cylinder
83.0 × 73.0 mm (3.27 × 2.87 in)
10.6 : 1
83.000 ~ 83.010 mm (3.2677 ~ 3.2681 in)
----
0.060 ~ 0.075 mm (0.0024 ~ 0.0030 in)
82.930 ~ 82.945 mm (3.2650 ~ 3.2656 in)
H
5.0 mm (0.20 in)
20.004 ~ 20.015 mm
(0.7876 ~ 0.7880 in)
1.0 mm (0.0394 in)
Intake side
19.991 ~ 20.000 mm
(0.7870 ~ 0.7874 in)
0.004 ~ 0.024 mm (0.0002 ~ 0.0009 in)
B
T
Barrel
1.00 × 2.70 mm (0.04 × 0.11 in)
0.20 ~ 0.35 mm (0.0079 ~ 0.0138 in)
0.030 ~ 0.070 mm (0.0012 ~ 0.0028 in)
2 - 7
SPEC
Standard Limit
----
----
----
----
----
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0.05 mm
(0.002 in)
0.15 mm
(0.0059 in)
----
----
20.045 mm
(0.7892 in)
----
----
19.971 mm
(0.7863 in)
0.074 mm
(0.0029 in)
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----
0.50 mm
(0.0197 in)
0.100 mm
(0.0039 in)