Yamaha F6BMH - Maintenance Specifications; Power Unit

MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
POWER UNIT
Item Unit
Model
World wide F6AMH, F6BMH F8CMH, F8CW
USA, Canada F6MH F8MH
CYLINDER HEAD
Warpage mm (in) 0.1 (0.004)
limit
CYLINDER BODY
Bore (D1, D2) mm (in) 56.000-56.015 (2.2047-2.2053)
Taper limit mm (in) 0.08 (0.0031)
Out-of-round limit mm (in) 0.05 (0.0020)
ROCKER ARM
Rocker arminside mm (in) 13.000-13.018 (0.5118-0.5125)
diameter
a
ROCKER ARM SHAFT
Rocker shaft mm (in) 12.941-12.951 (0.5095-0.5099)
outside
diameter
b
CAMSHAFT
Intake (A) mm (in) 23.45 - 23.55 (0.9232 - 0.9271)
Intake (B) mm (in) 19.95 - 20.05 (0.7854 - 0.7893)
Exhaust (A) mm (in) 23.45 - 23.55 (0.9232 - 0.9271)
Exhaust (B) mm (in) 19.95 - 20.05 (0.7854 - 0.7893)
Cylinder head mm (in) 17.975 - 17.991 (0.7077 - 0.7083)
Journal diameter
Oil pump housing journal
diameter
mm (in) 15.975 - 15.991 (0.6289 - 0.6296)
Camshaft round limit mm (in) 0.03 (0.0012)
VALVE
Valve clearance IN mm (in) 0.15 - 0.20 (0.006 - 0.008)
EX mm (in) 0.20 - 0.25 (0.008 - 0.010)
Valve dimensions
Head dimension “A” IN mm (in) 23.9 - 24.1 (0.94 - 0.95)
EX mm (in) 21.9 - 22.1 (0.86 - 0.87)
2-9