Yamaha F30A Service Manual page 35

Item
Rocker arm shaft
Outside diameter
Rocker arm
Inside diameter
Valve
Valve clearance (cold)
Intake
Exhaust
Head diameter (A)
Intake
Exhaust
Face width (B)
Intake
Exhaust
Seat contact width (C)
Intake and exhaust
Margin thickness (D)
Intake
Exhaust
Stem diameter
Intake
Exhaust
Stem runout limit
Intake
Exhaust
Guide inside diameter
Intake and exhaust
Stem-to-guide clearance
Intake
Exhaust
Valve spring
Free length
Tilt limit
Cylinder
Bore size
67C3K11
Unit
F30AMHD F40BMHD F40BWHD
mm (in) 15.971–15.991 (0.6288–0.6296)
mm (in) 16.000–16.018 (0.6299–0.6306)
mm (in) 0.20
mm (in) 0.30
mm (in)
mm (in)
mm (in) 1.84–2.97 (0.0724–0.1169)
mm (in) 1.98–3.11 (0.0780–0.1224)
mm (in)
mm (in)
mm (in)
mm (in) 5.475–5.490 (0.2156–0.2161)
mm (in) 5.460–5.475 (0.2150–0.2156)
mm (in)
mm (in)
mm (in) 5.500–5.512 (0.2165–0.2170)
mm (in) 0.010–0.037 (0.0004–0.0015)
mm (in) 0.025–0.052 (0.0010–0.0020)
mm (in)
mm (in)
mm (in) 64.985–65.015 (2.5585–2.5596)
Maintenance specification
Model
± ±
0.05 (0.008 0.002)
± ±
0.05 (0.012 0.002)
31.9–32.1 (1.256–1.264)
25.9–26.1 (1.020–1.028)
0.9–1.1 (0.035–0.043)
0.6–1.0 (0.024–0.039)
0.7–1.1 (0.028–0.043)
0.030 (0.0012)
0.016 (0.0006)
39.85 (1.5689)
1.7 (0.067)
F40BED
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