Maintenance Specifications; Engine - Yamaha f80a Service Manual

SPEC

MAINTENANCE SPECIFICATIONS

ENGINE

Item
CYLINDER HEAD
Warpage limit
Camshaft journal inside
diameter
Valve lifter hole inside diameter
CYLINDERS
Bore
Standard
Taper limit
Out-of-round limit
CAMSHAFTS
Intake (A)
Exhaust (A)
Intake and exhaust (B)
Valve lift
Intake
Exhaust
Camshaft journal diameter
Camshaft journal oil clearance
Maximum camshaft runout
VALVES
Face angle
Intake
Exhaust
Valve clearance (cold)
Intake
Exhaust
Head diameter (A)
Intake
Exhaust
Face width (B)
Intake
Exhaust
Seat width (C)
Intake
Exhaust
Margin thickness (D)
Intake
Exhaust
MAINTENANCE SPECIFICATIONS
Unit
mm (in)
mm (in) 25.000 ~ 25.021 (0.984 ~ 0.985)
mm (in) 28.000 ~ 28.021 (1.102 ~ 1.103)
mm (in) 79.000 ~ 79.020 (3.110 ~ 3.111)
mm (in)
mm (in)
mm (in) 37.22 ~ 37.38 (1.465 ~ 1.472)
mm (in) 36.90 ~ 37.06 (1.453 ~ 1.459)
mm (in) 29.92 ~ 30.08 (1.178 ~ 1.184)
mm (in)
mm (in)
mm (in) 24.96 ~ 24.98 (0.9827 ~ 0.9835)
mm (in) 0.020 ~ 0.061 (0.0008 ~ 0.0024)
mm (in)
Degree
Degree
mm (in)
mm (in)
mm (in) 29.00 ~ 29.20 (1.142 ~ 1.150)
mm (in) 24.00 ~ 24.20 (0.945 ~ 0.953)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
– 4 –
Model
F80
0.1 (0.004)
0.08 (0.003)
0.08 (0.003)
6.94 (0.273)
6.58 (0.259)
0.1 (0.004)
120, 91, 110
140, 91, 110
0.20 ± 0.03 (0.008 ± 0.001)
0.34 ± 0.03 (0.013 ± 0.001)
2.00 ~ 2.43 (0.079 ~ 0.096)
2.28 ~ 2.71 (0.090 ~ 0.107)
1.2 ~ 1.6 (0.047 ~ 0.063)
1.2 ~ 1.6 (0.047 ~ 0.063)
0.45 ~ 0.65 (0.018 ~ 0.026)
0.65 ~ 0.85 (0.026 ~ 0.033)
E
F100