APRILIA Atlantic 300 Service Station Manual page 136

Engine
Locking torques (N*m)
Timing chain tensioner support screw 11÷13 (8.1÷9.6 ftlb) Spark plug 12÷14 (8.9÷10.3 ftlb) Starter
ground screw 7÷8.5 (5.2÷6.3 ftlb) Timing chain tensioner pad screw 10÷14 (7.4÷10.3 ftlb) Starter
ground bell screw 11÷15 (8.1÷11.1 ftlb) Timing chain tensioner central screw 5÷6 (3.7÷4.4 ftlb)
Camshaft retention plate screw 4÷6 (3÷4.4 ftlb)
- Fit the timing chain guide pad.
- Insert the centring dowels between the cylinder
head and 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
Nm
- Tighten up the nuts to a second pre-torque of 10
±1 Nm
ENG - 136
ATLANTIC 300 i.e.