Crankcase Assembly - Yamaha F225F Service Manual

SPEC
Item
Valve stem
Diameter
Intake
Exhaust
Runout
Intake and exhaust
Valve guide
Inside diameter
Intake and exhaust
Valve guide clearance
Intake
Exhaust
Installation height

Crankcase assembly

Item
Piston
Diameter
Measuring point
Piston clearance
Ring groove (top)
Ring groove (2nd)
Ring groove (oil)
Pin boss inside diameter
Pin outside diameter
Cylinder
Bore
Piston ring
Top ring
Type
Dimension height (B)
Dimension width (T)
End gap (*1)
Side clearance
2nd ring
Type
Dimension height (B)
Dimension width (T)
End gap (*1)
Side clearance
Oil ring
Dimension height (B)
Dimension width (T)
End gap (*1)
Side clearance
1-21
Specification
Unit
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
Unit
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
Model
F300BET
5.477–5.492 (0.2156–0.2162)
5.464–5.479 (0.2151–0.2157)
0.01 (0.0004)
5.504–5.522 (0.2167–0.2174)
0.012–0.045 (0.0005–0.0018)
0.025–0.058 (0.0010–0.0023)
11.300–11.700 (0.4449–0.4606)
Model
F225FET FL225FET
95.945–95.960 (3.7774–3.7779)
13.500 (0.5315)
0.040–0.067 (0.0016–0.0026)
1.230–1.250 (0.0484–0.0492)
1.220–1.240 (0.0480–0.0488)
2.510–2.530 (0.0988–0.0996)
22.011–22.018 (0.8666–0.8668)
21.996–22.005 (0.8660–0.8663)
96.000–96.012 (3.7795–3.7800)
Barrel
1.200 (0.0472)
2.800–3.000 (0.1102–0.1181)
0.200–0.300 (0.0079–0.0118)
0.030–0.050 (0.0012–0.0020)
Taper
1.170–1.190 (0.0461–0.0469)
3.800–4.000 (0.1496–0.1575)
0.600–0.750 (0.0236–0.0295)
0.030–0.070 (0.0012–0.0028)
2.400–2.470 (0.0945–0.0972)
2.350–2.750 (0.0925–0.1083)
0.150–0.600 (0.0059–0.0236)
0.040–0.130 (0.0016–0.0051)
FL300BET
F250DET FL250DET