Cylinder Head Assembly - Yamaha F4B Service Manual

SPEC

Cylinder head assembly

Item
Valve
Clearance
Intake and exhaust
Margin thickness
Intake
Exhaust
Runout (*1)
Intake
Exhaust
Seat contact width
Intake and exhaust
Cylinder head
Warpage limit
Push rod
Runout
Intake and exhaust
Valve spring
Free length
Tilt limit
Valve stem
Diameter
Intake
Exhaust
Runout (*1)
Intake
Exhaust
Valve guide
Inside diameter
Intake and exhaust
Clearance
Intake
Exhaust
Installation height
Cam shaft
Cam lobe height
Intake
Exhaust
Cam lobe width
Intake and exhaust
Fuel pump cam diameter (*1)
Journal diameter
Runout
(*1) The figures are for reference only.
1-7
Specification
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)
mm (in)
mm (in)
Model
F4BMH F5AMH
0.08–0.12 (0.003–0.005)
0.800–1.200 (0.0315–0.0472)
1.100–1.500 (0.0433–0.0591)
0.050 (0.0020)
0.030 (0.0012)
0.6–0.8 (0.02–0.03)
0.10 (0.0039)
0.5 (0.02)
27.6 (1.09)
1.0 (0.04)
5.475–5.490 (0.2156–0.2161)
5.460–5.475 (0.2150–0.2156)
0.050 (0.0020)
0.030 (0.0012)
5.500–5.512 (0.2165–0.2170)
0.010–0.037 (0.0004–0.0015)
0.025–0.052 (0.0010–0.0020)
8.2–9.1 (0.32–0.36)
32.037–32.137 (1.2613–1.2652)
32.038–32.138 (1.2613–1.2653)
26.950–27.050 (1.0610–1.0650)
19.600 (0.7717)
14.965–14.990 (0.5892–0.5902)
0.030 (0.0012)
F6CMH