Cylinder Head Assembly - Yamaha F225F Service Manual

SPEC
Item
Thermostat
Valve opening temperature
Fully open temperature
Fully open stroke
Replacement engine oil quan-
tity (at periodic maintenance)
Without oil filter replacement
With oil filter replacement
(*1) Measuring conditions: Ambient temperature 20 °C (68 °F), with spark plugs removed from all
cylinders. The figures are for reference only.
(*2) For the checking method, see "Checking the oil pressure" (7-1). The figures are for reference
only.

Cylinder head assembly

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
1-19
Specification
Unit
°C (°F)
°C (°F)
mm (in)
L (US qt,
Imp qt)
L (US qt,
Imp qt)
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)
Model
F300BET
50.0–54.0 (122.0–129.0)
62.0 (144.0)
4.3 (0.17)
6.0 (6.34, 5.28)
6.3 (6.66, 5.54)
Model
F225FET FL225FET
30.970–30.980 (1.2193–1.2197)
0.020–0.055 (0.0008–0.0022)
46.661–46.761 (1.8370–1.8410)
46.960–47.060 (1.8488–1.8528)
35.950–36.050 (1.4154–1.4193)
24.960–24.980 (0.9827–0.9835)
0.030 (0.0012)
0.10 (0.0039)
25.000–25.021 (0.9843–0.9851)
48.1 (1.89)
1.7 (0.07)
0.205 ± 0.035 (0.0081 ± 0.0014)
0.345 ± 0.035 (0.0136 ± 0.0014)
1.100–1.400 (0.0433–0.0551)
1.400–1.700 (0.0551–0.0669)
0.750–1.150 (0.0295–0.0453)
0.900–1.300 (0.0354–0.0512)
FL300BET
F250DET FL250DET