APRILIA V990 Manual page 34

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TECHNICAL INFORMATION
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Head/stud bolt
Head/chain compartment
Rear head/bearing flange
Rear head/bearing flange
Front head/Driven gear (timing chain) - Inlet camshaft
Front head/Upper chain guide
Rear head/Driven gear (timing chain) - Inlet camshaft
Rear head/Driving gear (upper balance shaft unit) + driven gear
(timing chain) - Exhaust camshaft
Rear head/Counterweight + driven gear (upper balance shaft unit)
- Upper balance shaft
Rear head/Upper chain guide
Valve cover
Head
Induction flange
Cylinder/chain tightener
Front head
Rear head
Cylinder bracket support shoe
Cylinder bracket support shoe
2
- 18
- 00
Head, cylinders
8
Screw T.C.E.I.
4
2
Screw T.E. M6 x 35
2
Screw T.E. M6 x 20
Screw T.C.E.I.
3
1
Screw T.C.E.I.
3
Screw T.C.E.I.
3
1
2
Screw T.E. M6 x 35
10
4
Screw T.C.E.I.
4
2
1
Coolant thermistor
1
Coolant thermistor
Screw T.C.E.I.
2
2
varnished
head version
58 Nm (5.8
kgm)
varnished
head version
Nut M10
50 – 55 Nm
(5.0 – 5.5 kgm)
varnished
head version
(with nut on
outer side) 58
Nm (5.8 Kgm)
11
M6 x 100
11
11
11
M6 x 14
Screw spacer
11
M6 x 16
11
M6 x 11.5
11
M6 x 14
Nut M14 x 1
50
11
Spacer screw
9
M6 x 23
Spark plug
18
19
M8 x 25
Plug screw
30
M16 x 1.5
20
20
40
M10 x 40
Nut M10
40
Release 00/2001-06
V990 engine
Grease
the nut
support
surface
1.1
1.1
1.1
1.1
L243
1.1
1.1
L243
1.1
L243
5.0
L243
1.1
0.9
1.8
1.9
3.0
2.0
2.0
4.0
4.0
L243
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