Power unit technical data Item Valve stem Diameter Intake Exhaust Runout Intake and exhaust Valve guide Inside diameter Intake and exhaust Valve guide clearance Intake Exhaust Installation height Item Valve lifter Outside diameter Valve lifter clearance Camshaft Cam lobe height Intake Exhaust Cam lobe width Intake and exhaust Journal diameter Runout Cylinder head Warpage limit Journal inside diameter Valve spring Free length Tilt limit Valve Clearance Intake Exhaust Seat contact width Intake Exhaust Margin thickness Intake Exhaust
Unit
Model F225CA
LF225CA
F250CA
LF250CA
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)
Unit
0 1 2 3
Model F300CA
LF300CA
mm (in) mm (in)
30.970–30.980 (1.2193–1.2197) 0.020–0.055 (0.0008–0.0022)
mm (in) mm (in)
46.661–46.761 (1.8370–1.8410) 46.960–47.060 (1.8488–1.8528)
mm (in) mm (in) mm (in)
35.950–36.050 (1.4154–1.4193) 24.960–24.980 (0.9827–0.9835) 0.030 (0.0012)
mm (in) mm (in)
0.10 (0.0039) 25.000–25.021 (0.9843–0.9851)
mm (in) mm (in)
48.1 (1.89) 1.7 (0.07)
mm (in) mm (in)
0.205 ± 0.035 (0.0081 ± 0.0014) 0.345 ± 0.035 (0.0136 ± 0.0014)
mm (in) mm (in)
1.100–1.400 (0.0433–0.0551) 1.400–1.700 (0.0551–0.0669)
mm (in) mm (in)
0.750–1.150 (0.0295–0.0453) 0.900–1.300 (0.0354–0.0512)
4 5 6 7 8 9 10
A 1-20