Monster 659 Owner's Manual page 98

Insert the right (6) and left tank retaining screws (4), with
nylon washers (7), and (5).
Tighten the screws (1) and (2) to a torque of 2 Nm ±10%,
starting from the screws (2) around the cap.
Tighten the screws (4) and (5) to a torque of 2 Nm ±10%.
Refit the seat (page 61).
4 7 6
1
5
fig. 102
2
fig. 103
E
3
1
97