Yamaha F50D Servise Manual page 170

POWR
b
a
2. Install the dowels 5, a new gasket 6,
and cylinder head 7.
3. Tighten the cylinder head bolts 8, 9 to
the specified torques in 2 stages and in
the sequence numbers ( ,
7
5
6
5
7-29
Power unit
1
4
2
3
, ···).
8
9
9
9
Cylinder head bolt (M9) 8:
1st: 23 N·m (2.3 kgf·m, 17.0 ft·lb)
2nd: 47 N·m (4.7 kgf·m, 34.7 ft·lb)
Cylinder head bolt (M6) 9:
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.9 ft·lb)
4. Adjust the valve clearances. See "Check-
ing the valve clearance" (7-2).
8
5. Install a new gasket 0 and cylinder head
8
cover q, and then tighten the cylinder
8 head cover bolts w.
8
0
w
q
w