Yamaha F30A Service Manual page 43

Item
Piston
Piston diameter (D)
Measuring point (H)
(*1)
Piston clearance
Piston pin boss bore
Oversize piston diameter
1st
2nd
Piston ring groove
Top ring
2nd ring
Oil ring
Piston pin
Outside diameter
Piston ring
Top ring
Dimension B
Dimension T
(*1)
End gap
Side clearance
2nd ring
Dimension B
Dimension T
(*1)
End gap
Side clearance
Oil ring
Dimension B
Dimension T
(*1)
End gap
Side clearance
Connecting rod
Small end inside diameter
Big end inside diameter
Big end side clearance
Crankpin oil clearance
Big end bearing thickness
Blue
Black
Brown
(*1)
The figures are for reference only.
67C3K11
Unit
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
B
mm (in)
T
mm (in)
mm (in)
mm (in)
B
mm (in)
T
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
(*1)
mm (in)
(*1)
mm (in)
mm (in)
mm (in)
mm (in)
Maintenance specification
Model
F30AEHT F30AET
64.950–64.965 (2.5571–2.5577)
2.0 (0.08)
0.035–0.065 (0.0014–0.0026)
15.974–15.985 (0.6289–0.6293)
65.200–65.215 (2.5669–2.5675)
65.450–65.465 (2.5768–2.5774)
1.21–1.23 (0.0476–0.0484)
1.51–1.53 (0.0594–0.0602)
2.52–2.54 (0.0992–0.1000)
15.965–15.970 (0.6285–0.6287)
Barrel
1.17–1.19 (0.0461–0.0469)
2.30–2.50 (0.0906–0.0984)
0.15–0.30 (0.0059–0.0118)
0.02–0.06 (0.0008–0.0024)
Taper
1.47–1.49 (0.0579–0.0587)
2.60–2.80 (0.1024–0.1102)
0.30–0.50 (0.0118–0.0197)
0.02–0.06 (0.0008–0.0024)
2.36–2.48 (0.0929–0.0976)
2.75 (0.1083)
0.20–0.70 (0.0079–0.0276)
0.04–0.18 (0.0016–0.0071)
15.985–15.998 (0.6293–0.6298)
36.000–36.024 (1.4173–1.4183)
0.12–0.15 (0.0047–0.0059)
0.020–0.052 (0.0008–0.0020)
1.494–1.498 (0.0588–0.0590)
1.490–1.494 (0.0587–0.0588)
1.486–1.490 (0.0585–0.0587)
F40BWHT F40BET
2-16
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