Yamaha F30A 2018, Service Manual

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A-11
Model
F 3 0BEHD
F 3 0EHA
F 3 0HA
F 3 0BET
F 3 0A
F40FED
F40FEHD
F40EHA
F40HA
F40FET
F40A
1st oversize diameter 65.200–65.215 mm (2.5669–2.5675 in)
2nd oversize diameter 65.450–65.465 mm (2.5768–2.5774 in)
Measuring point 5.0 mm (0.20 in)
Piston clearance 0.035–0.065 mm (0.0014–0.0026 in)
Limit 0.115 mm (0.0045 in)
Ring groove (Top) 1.21–1.23 mm (0.0476–0.0484 in)
Ring groove (2nd) 1.51–1.53 mm (0.0594–0.0602 in)
Ring groove (Oil) 2.52–2.54 mm (0.0992–0.1000 in)
Pin boss inside diameter 15.974–15.985 mm (0.6289–0.6293 in)
Limit 16.005 mm (0.6301 in)
Pin outside diameter 15.965–15.970 mm (0.6285–0.6287 in)
Limit 15.955 mm (0.6281 in)
Piston ring (Top)
Type Barrel
Height (B) 1.170–1.190 mm (0.0461–0.0469 in)
Width (T) 2.300–2.500 mm (0.0906–0.0984 in)
End gap 0.15–0.30 mm (0.0059–0.0118 in)
Limit 0.500 mm (0.0197 in)
End gap measuring
point
10.0 mm (0.39 in)
Side clearance 0.02–0.06 mm (0.0008–0.0024 in)
Limit 0.110 mm (0.0043 in)
Piston ring (2nd)
Type Taper
Height (B) 1.470–1.490 mm (0.0579–0.0587 in)
Width (T) 2.600–2.800 mm (0.1024–0.1102 in)
End gap 0.30–0.50 mm (0.0118–0.0197 in)
Limit 0.700 mm (0.0276 in)
Side clearance 0.02–0.06 mm (0.0008–0.0024 in)
Limit 0.110 mm (0.0043 in)
Piston ring (Oil)
Height (B) 2.360–2.480 mm (0.0929–0.0976 in)
Width (T) 2.750 mm (0.1083 in)
End gap 0.20–0.70 mm (0.0079–0.0276 in)
Side clearance 0.04–0.18 mm (0.0016–0.0071 in)