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Vespa
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Si
Vespa Si User Manual
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2
Table of Contents
General Index
3
Specifications
4
Specifications: CIAO P-PV-PX-PXV
4
Specifications: BRAVO P-PV
5
Specifications: si (SIM-SIV)
6
Specifications: CIAO-BRAVO-SI
7
Type Identification
7
Engine and Transmission Diagram
8
General Instructions for Maintenance and Lubrication
9
Fault Finding
12
Engine: Lack of Power
12
Engine: Hard Starting
12
Tendency of the Engine to Stop When the Throttle Is Full Open
13
Exhaust Noise Grows Weak
13
Irregular Engine Exhaust
14
Carburetor Fault Finding
15
High Consumption
15
Defective Slow Running
15
Steering, Transmission, Braking System - Fault Finding
16
Suspensions: Knocking or Defective Running
17
Electrical Equipment Diagram: CIAO - Bravo
19
Electrical Equipment Diagram: si
20
Electrical Equipment Diagram: si with Electronic Ignition
21
Electrical Equipment Diagram: Ciao PX
22
Electrical Equipment Diagram Bravo PV
24
Electrical Equipment Diagram si
25
Electrical Equipment Diagram Bravo
26
Electrical Equipment Diagram CIAO
30
Electronic Ignition
36
Device Description
37
Rules to be Observed When Operate on Electric Devices
38
Checking to be Carried out in the Case of Troubles on the Ignition
39
Checking Ignition Timing
40
Tool for Dismantling, Overhauling and Assembling Operations
41
Complete Disassembly of Vehicles
44
Removal of Engine from Chassis
44
Cylinder Head-Cylinder
45
Gudgeon Pin, Piston and Flywheel Rotor
45
Oil Seal, Flywheel Side
45
Separation of Crankcase Halves
46
Crankshaft from Crankcase Cover
46
Main Ball Bearing from Crankshaft
46
Main Ball Bearing from Crankcase
46
Rear Transmission
47
Driven Pulley
47
Drive Pulley Unit - Clutch
47
Centrifugal Weights of Starting
48
Adjustable and Fixed Driven Pulley Half
49
DC Roller Bearings from Speed Governor
49
Wheel and Rear Hub
49
Rear Brake Shoe
50
Rear Hub
50
DC Roller Bearing from Rear Hub Cover
50
DC Roller Bearings from Rear Hub Case
51
Vehicles with Speed Governor
51
Swinging Arm
51
Bracket and Damper
52
Upper Cone and Font Fork
52
Upper Cone and Front Fork
53
Front Suspension
53
Fork Tube of Front Suspension
53
Oil Seal
54
Lower and Upper Tracks of the Steering Bearings
55
Assembly Play
56
Cylinder and Piston
56
Small End - Wrist Pin - Roller Cage
57
Piston - Wrist Pin
57
Overhauling
58
Carburettor Overhaul
58
Overhauling of Drive Pulley with Speed Governor
59
Overhauling of the Swinging Arm Anchorage, Dismantling
59
Reassembly
59
Central Stand Overhauling
60
Removal of Central Stand Anchor Pin
60
Reassembly and Caulking of Central Stand Anchor Pin
60
Overhauling of Contact Breaker-Coils Unit
60
Removal and Reassembly of the Security Lock
61
Lubrication of Transmissions Sheaths
62
Cable Harness from Chassis
64
Painting
64
Reassembly of Vehicles
65
Notes Concerning Reassembly
65
Locking Torques (Kgm)
66
Reassembling Crankshaft
68
Main Ball Bearings
68
Crankshaft Alignment Check
68
Crankcase Coupling
68
Crankshaft Oil Seal on Crankcase Haives
69
Piston - Wrist Pin - Cylinder - Cylinder Head
69
Description of Timing Operations
70
Checking Engine Timing of "SI" with Electronic Ignition
71
D.C. Roller Bearing on Drive Pulley
72
DC Roller Bearing on Speed Governor Clutch Weights Anchor Plate
73
DC Roller Bearings on Rear Hub Housing, Half
73
DC Roller Bearings on Rear Hub Housing, Half, Cover
74
Mating of Hub Housing Half - Rear Hub Cover
74
Swinging Arm - Rear Brake Jaw - Engine and Hub on Frame
74
Transmission Belt Adjustment
75
Front Suspension Disassembly
75
Lower Track of Lower Steering Column Bearing
76
Leg of Telescopic Fork
76
Telescopic Fork
77
Upper and Lower Track of Steering Column
77
Ring Nut for Steering Column Upper Bearing
77
Steering Upper Plate and Fork Upper Bracket
77
Operations and Checks before Operating
79
Automatic Mixer Dismantling
81
Dismantling and Reassembling of Engine from Chassis
81
Crankshaft from Crankcase, Half Engine Closing Side
81
Electrical Equipment Diagram "Si" US Market
82
4
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Vespa Si Specifications
General
Rear Brake
Drum
Width
700 mm
Cooling System
Air cooled
Transmission
Automatic
Ignition
Electronic
Rear Suspension
shock absorber
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