Yamaha VK540EF Service Manual page 128

CYLINDER HEAD AND CYLINDER
9. Install:
D Gasket (cylinder head)
D Cylinder heads
10. Tighten:
D Nuts (cylinder head)
Tightening steps:
D Temporarily tighten the cylinder head nuts
1st step:
D Tighten the nuts 1 X 6
2nd step:
D Retighten the nuts 1 X 6
5-13
1 X 6 as follows.
Nut (cylinder head) 1 X 6 :
13 Nm (1.3 mDkg, 9.4 ftDlb)
Nut (cylinder head) 1 X 6 :
25 Nm (2.5 mDkg, 18.1 ftDlb)
ENG