Yamaha F50F, Service Manual

Page: 36 / 305

SPEC
Specifications
2-13
6C13G11
Stem diameter
Intake mm (in) 5.475–5.490 (0.2156–0.2161)
Exhaust mm (in) 5.460–5.475 (0.2150–0.2156)
Guide inside diameter
Intake and exhaust mm (in) 5.500–5.512 (0.2165–0.2170)
Stem-to-guide clearance
Intake and exhaust mm (in) 0.025–0.052 (0.0010–0.0020)
Stem runout limit
Intake mm (in) 0.05 (0.0020)
Exhaust mm (in) 0.03 (0.0012)
Valve springs
Free length mm (in) 39.85 (1.5689)
Tilt limit mm (in) 1.7 (0.07)
Connecting rods
Small end inside diameter mm (in) 15.985–15.998 (0.6293–0.6298)
Big end inside diameter mm (in) 36.000–36.024 (1.4173–1.4183)
Connecting rod big end side
clearance mm (in) 0.05–0.22 (0.0020–0.0087)
Crankpin oil clearance mm (in) 0.016–0.040 (0.0006–0.0016)
Big end bearing thickness
Yellow mm (in) 1.500–1.504 (0.0591–0.0592)
Red mm (in) 1.496–1.500 (0.0589–0.0591)
Pink mm (in) 1.492–1.496 (0.0587–0.0589)
Green mm (in) 1.488–1.492 (0.0586–0.0587)
Crankshaft
Crankshaft journal diameter mm (in) 42.984–43.000 (1.6923–1.6929)
Crankpin diameter mm (in) 32.984–33.000 (1.2986–1.2992)
Crankpin width mm (in) 21.000–21.070 (0.8268–0.8295)
Runout limit mm (in) 0.03 (0.0012)
Crankcase
Crankshaft main journal oil
clearance mm (in) 0.012–0.036 (0.0005–0.0014)
Crankcase main journal
bearing thickness
Yellow mm (in) 1.502–1.506 (0.0591–0.0592)
Red mm (in) 1.498–1.502 (0.0590–0.0591)
Pink mm (in) 1.494–1.498 (0.0588–0.0590)
Green mm (in) 1.490–1.494 (0.0587–0.0588)
Item Unit
Model
F60CEHT F60CET FT60DET