Yamaha F50F - Page 29

6C13G11
2-6
1
2
3
4
5
6
7
8
9
2nd piston ring
Dimension B mm (in) 1.47–1.49 (0.0579–0.0587)
Dimension T mm (in) 2.60–2.80 (0.1024–0.1102)
End gap mm (in) 0.30–0.50 (0.0118–0.0197)
Side clearance mm (in) 0.02–0.06 (0.0008–0.0024)
Oil ring
Dimension B mm (in) 2.36–2.48 (0.0929–0.0976)
Dimension T
(*1)
mm (in) 2.75 (0.1083)
End gap mm (in) 0.20–0.70 (0.0079–0.0276)
Side clearance mm (in) 0.04–0.18 (0.0016–0.0071)
Camshaft
Intake (A) mm (in) 30.888–30.988 (1.2161–1.2200)
Exhaust (A) mm (in) 30.824–30.924 (1.2135–1.2175)
Intake and
exhaust (B)
mm (in) 25.950–26.050 (1.0216–1.0256)
Camshaft journal diameter
#1
mm (in) 36.925–36.945 (1.4537–1.4545)
Camshaft journal diameter
#2, #3, #4
mm (in) 36.935–36.955 (1.4541–1.4549)
Camshaft journal oil clearance mm (in) 0.045–0.090 (0.0018–0.0035)
Camshaft runout limit mm (in) 0.03 (0.0012)
Rocker arm shaft
Rocker arm shaft outside
diameter
mm (in) 15.971–15.991 (0.6288–0.6296)
Rocker arms
Rocker arm inside diameter mm (in) 16.000–16.018 (0.6299–0.6306)
Valves
Valve clearance (cold)
Intake mm (in) 0.20
±
0.05 (0.008
±
0.002)
Exhaust mm (in) 0.30
±
0.05 (0.012
±
0.002)
Head diameter (A)
Intake mm (in) 31.90–32.10 (1.256–1.264)
Exhaust mm (in) 26.60–26.80 (1.047–1.055)
Face width (B)
Intake mm (in) 1.98–2.40 (0.078–0.094)
Exhaust mm (in) 2.16–2.79 (0.085–0.110)
Seat contact width (C)
Intake and exhaust mm (in) 1.3–1.5 (0.051–0.059)
Margin thickness (D)
Intake mm (in) 0.8–1.2 (0.031–0.047)
Exhaust mm (in) 1.0–1.4 (0.039–0.055)
(*1)
The figures are for reference only.
Item Unit
Model
F50FED F50FEHT F50FET FT50GET
Maintenance specification