SPEC
Specification Item
Valve stem Diameter Intake Exhaust Runout Intake and exhaust Valve guide Inside diameter Intake and exhaust Valve guide clearance Intake Exhaust Installation height
Unit
Model F300CA
LF300CA
mm (in) mm (in)
5.477–5.492 (0.2156–0.2162) 5.464–5.479 (0.2151–0.2157)
mm (in)
0.01 (0.0004)
mm (in)
5.504–5.522 (0.2167–0.2174)
mm (in) mm (in) mm (in)
0.012–0.045 (0.0005–0.0018) 0.025–0.058 (0.0010–0.0023) 11.300–11.700 (0.4449–0.4606)
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
Unit
Model F225CA
LF225CA
F250CA
LF250CA
mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in)
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)
mm (in)
96.000–96.012 (3.7795–3.7800)
mm (in) mm (in) mm (in) mm (in)
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)
mm (in) mm (in) mm (in) mm (in)
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)
mm (in) mm (in) mm (in) mm (in)
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)