Yamaha F30A Service Manual page 36

SPEC
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.
2-9
Specification
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)
F30AMHD F40BMHD F40BWHD
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)
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)
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)
Model
F40BED
Barrel
Taper
67C3K11