Yamaha F50A - Page 50

SPEC
Specifications
2-7
62Y3A11
Margin thickness (D)
Intake mm (in) 0.6–1.0 (0.024–0.039)
Exhaust mm (in) 0.7–1.1 (0.028–0.043)
Stem diameter
Intake mm (in) 5.48–5.49 (0.2157–0.2161)
Exhaust mm (in) 5.46–5.47 (0.2150–0.2153)
Guide inside diameter
Intake and exhaust mm (in) 5.50–5.51 (0.2165–0.2169)
Stem-to-guide clearance
Intake mm (in) 0.01–0.03 (0.0004–0.0012)
Exhaust mm (in) 0.03–0.05 (0.0012–0.0020)
Stem runout limit mm (in) 0.03 (0.0012)
Valve springs
Free length mm (in) 39.85 (1.569)
Minimum free length mm (in) 37.85 (1.490)
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)
Crank pin oil clearance mm (in) 0.016–0.040 (0.0006–0.0015)
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)
Crank pin
Diameter mm (in) 32.984–33.000 (1.2986–1.2992)
Runout limit mm (in) 0.04 (0.0016)
Crankcase
Crankcase main journal inside
diameter
mm (in) 46.000–46.024 (1.8110–1.8120)
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 (0.0591–0.0593)
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
USA ———F50TR
Canada — F50TH — F50TR
Worldwide F50AEHD F50AEHT F50AED F50AET