Maintenance Specification; Power Unit - Yamaha F80B Service Manual

SPEC

Maintenance specification

Power unit

Item
Power unit
Minimum compression
(*1)
pressure
(*2)
Oil pressure
Cylinder head
Warpage limit
(lines indicate straightedge
position)
Camshaft cap inside diameter
Cylinders
Bore size
Taper limit
Out-of-round limit
Pistons
Piston diameter (D)
Measuring point (H)
Piston clearance
Over size piston diameter
Piston rings
Top ring
Dimension B
Dimension T
End gap
Side clearance
2nd piston ring
Dimension B
Dimension T
End gap
Side clearance
(*1)
Measuring conditions:
Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
(*2)
The figures are for reference only.
2-3
Specifications
Unit
kPa
(kgf/cm
kPa
(kgf/cm
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)
F80BET
2
, psi)
510 (5.1, 74.0) at engine idle speed
2
, psi)
25.000–25.021 (0.9843–0.9851)
79.000–79.020 (3.1102–3.1110)
78.928–78.949 (3.1074–3.1082)
0.070–0.080 (0.0028–0.0031)
79.178–79.199 (3.1172–3.1181)
1.17–1.19 (0.0461–0.0469)
2.80–3.00 (0.1102–0.1181)
0.15–0.30 (0.0059–0.0118)
0.04–0.08 (0.0016–0.0031)
1.47–1.49 (0.0579–0.0587)
3.00–3.20 (0.1181–0.1260)
0.70–0.90 (0.0276–0.0354)
0.03–0.07 (0.0012–0.0028)
Model
F100DET
860 (8.6, 124.7)
0.1 (0.0039)
0.08 (0.0031)
0.05 (0.0020)
13.0 (0.51)
2
6D93G11