Crankcase Assembly - Yamaha F50D Servise Manual

Item
Camshaft
Cam lobe height
Intake
Exhaust
Cam lobe width
Intake
Exhaust
Journal diameter #1
Journal diameter #2, #3, #4
Runout
Rocker arm shaft
Outside diameter
Rocker arm
Inside diameter
Valve
Clearance
Intake
Exhaust
Seat contact width
Intake
Exhaust
Margin thickness
Intake
Exhaust

Crankcase assembly

Item
Cylinder
Bore
Piston
Diameter
Measuring point
Piston clearance
Ring groove (Top)
Ring groove (2nd)
Ring groove (Oil)
Pin boss inside diameter
Pin outside diameter
Oversize diameter
1st
2nd
Unit
F50DET
mm (in) 30.888–30.988 (1.2161–1.2200)
mm (in) 30.824–30.924 (1.2135–1.2175)
mm (in) 25.950–26.050 (1.0217–1.0256)
mm (in) 25.950–26.050 (1.0217–1.0256)
mm (in) 36.925–36.945 (1.4537–1.4545)
mm (in) 36.935–36.955 (1.4541–1.4549)
mm (in)
mm (in) 15.971–15.991 (0.6288–0.6296)
mm (in) 16.000–16.018 (0.6299–0.6306)
mm (in) 0.20 ± 0.05 (0.008 ± 0.002)
mm (in) 0.30 ± 0.05 (0.012 ± 0.002)
mm (in) 0.900–1.100 (0.0354–0.0433)
mm (in) 0.900–1.100 (0.0354–0.0433)
mm (in) 0.600–1.000 (0.0236–0.0394)
mm (in) 0.700–1.100 (0.0276–0.0433)
Unit
F50DET
mm (in) 63.000–63.015 (2.4803–2.4809)
mm (in) 62.950–62.965 (2.4783–2.4789)
mm (in)
mm (in) 0.035–0.065 (0.0014–0.0026)
mm (in) 1.230–1.250 (0.0484–0.0492)
mm (in) 1.520–1.540 (0.0598–0.0606)
mm (in) 2.510–2.530 (0.0988–0.0996)
mm (in) 15.974–15.985 (0.6289–0.6293)
mm (in) 15.965–15.970 (0.6285–0.6287)
mm (in) 63.200–63.215 (2.4882–2.4888)
mm (in) 63.450–63.465 (2.4980–2.4986)
Power unit technical data
Model
FT50CET FT50CED
0.030 (0.0012)
Model
FT50CET FT50CED
5.0 (0.20)
FT50CEHD
0
1
2
3
4
5
6
7
FT50CEHD
8
9
10
A
1-10