VESPA GTS 250 I.E. Workshop Manual page 145

Vespa GTS 250 I.E.
Engine
Timing chain tensioner support screw 11 ÷ 13
Spark plug 12 ÷ 14 Starter ground screw 7 ÷
8.5 Timing chain tensioner slider screw 10 ÷
14 Start-up counterweight support screw 11 ÷
15 Timing chain tensioner central screw 5 - 6
Camshaft retention plate screw 4 ÷ 6
- Fit the timing chain guide pad.
- Insert the centring dowel between the cylinder
head to the cylinder, fit the cylinder head gasket
and the cylinder head.
- Lubricate the stud bolt threading.
- Tighten up the nuts to an initial pre-torque of 7±1
N·m
- Tighten up the nuts to a second pre-torque of 10
±1 N·m
- Rotate by an angle of 270°
- To carry out the operations described above, fol-
low the tightening sequence in the figure.
ENG - 47