Yamaha F15B Service Manual page 20

SPEC
Item
Stem diameter
Intake
Exhaust
Guide inside diameter
Intake and exhaust
Stem-to-guide clearance
Intake and exhaust
Stem run-out limit
Valve springs
Free length
Minimum free length
Tilt limit
Connecting rods
Small-end inside diameter
Big-end inside diameter
Crankpin oil clearance
Crankshaft
Crankshaft journal diameter
Crankpin diameter
Crankpin width
Run-out limit
Big end side clearance
Crankcase
Crankshaft main journal oil
clearance
Upper and lower crankcase
main journal bearing thickness
A - (Blue)
B - (Black)
C - (Brown)
Oil pump
Type
Outer rotor-to-housing
clearance
Outer rotor-to-inner rotor
clearance
Rotor-to-cover clearance (C)
Discharge
Relief valve opening pressure
2-5
Specifications
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)
(A)
mm (in)
(B)
mm (in)
L (US gal,
lmp gal)/min
kPa
(kgf/cm
F15BMH
5.475–5.490 (0.2156–0.2161)
5.460–5.475 (0.2150–0.2156)
5.500–5.512 (0.2165–0.2170)
0.025–0.052 (0.0010–0.0020)
14.015–14.029 (0.5518–0.5523)
31.030–31.042 (1.2217–1.2221)
0.021–0.045 (0.0008–0.0018)
34.997–35.009 (1.3778–1.3783)
30.997–31.009 (1.2204–1.2208)
21.000–21.070 (0.8268–0.8295)
0.050–0.220 (0.0020–0.0087)
0.012–0.045 (0.0005–0.0018)
1.494–1.498 (0.0588–0.0590)
1.498–1.502 (0.0590–0.0591)
1.502–1.506 (0.0591–0.0593)
0.100–0.150 (0.0039–0.0059)
0.040–0.140 (0.0016–0.0055)
0.030–0.090 (0.0012–0.0035)
2 , psi) (3.88–4.50, 56.3–65.3)
Model
F15BM
0.01 (0.0004)
34.40 (1.3543)
32.68 (1.2866)
1.5 (0.06)
0.05 (0.0020)
Trochoid
5.70 (1.506, 1.254)
388.0–450.0
6D45F11