Yamaha YZ 2020 Series Owner's Service Manual page 209

Removing the cylinder head
10 N ・ m (1.0 kgf ・ m, 7.4 lb ・ ft)
Order Job/Parts to remove
6 Timing chain guide (intake side)
7 Oil passage plug
M
7
6
5-22
CYLINDER HEAD
30 N ・ m (3.0 kgf ・ m, 22 lb ・ ft)
1st
15 N ・ m (1.5 kgf ・ m, 11 lb ・ ft)
2nd
3rd 60˚
4th
60˚
(2)
10 N ・ m (1.0 kgf ・ m, 7.4 lb ・ ft)
Q'ty Remarks
1
1