Vespa Si - Checking SI Engine Timing (Electronic Ignition)

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General Index3
Specifications4
Specifications: CIAO P-PV-PX-PXV4
Specifications: BRAVO P-PV5
Specifications: si (SIM-SIV)6
Specifications: CIAO-BRAVO-SI7
Type Identification7
Engine and Transmission Diagram8
General Instructions for Maintenance and Lubrication9
Fault Finding12
Engine: Lack of Power12
Engine: Hard Starting12
Tendency of the Engine to Stop When the Throttle Is Full Open13
Exhaust Noise Grows Weak13
Irregular Engine Exhaust14
Carburetor Fault Finding15
High Consumption15
Defective Slow Running15
Steering, Transmission, Braking System - Fault Finding16
Suspensions: Knocking or Defective Running17
Electrical Equipment Diagram: CIAO - Bravo19
Electrical Equipment Diagram: si20
Electrical Equipment Diagram: si with Electronic Ignition21
Electrical Equipment Diagram: Ciao PX22
Electrical Equipment Diagram Bravo PV24
Electrical Equipment Diagram si25
Electrical Equipment Diagram Bravo26
Electrical Equipment Diagram CIAO30
Electronic Ignition36
Device Description37
Rules to be Observed When Operate on Electric Devices38
Checking to be Carried out in the Case of Troubles on the Ignition39
Checking Ignition Timing40
Tool for Dismantling, Overhauling and Assembling Operations41
Complete Disassembly of Vehicles44
Removal of Engine from Chassis44
Cylinder Head-Cylinder45
Gudgeon Pin, Piston and Flywheel Rotor45
Oil Seal, Flywheel Side45
Separation of Crankcase Halves46
Crankshaft from Crankcase Cover46
Main Ball Bearing from Crankshaft46
Main Ball Bearing from Crankcase46
Rear Transmission47
Driven Pulley47
Drive Pulley Unit - Clutch47
Centrifugal Weights of Starting48
Adjustable and Fixed Driven Pulley Half49
DC Roller Bearings from Speed Governor49
Wheel and Rear Hub49
Rear Brake Shoe50
Rear Hub50
DC Roller Bearing from Rear Hub Cover50
DC Roller Bearings from Rear Hub Case51
Vehicles with Speed Governor51
Swinging Arm51
Bracket and Damper52
Upper Cone and Font Fork52
Upper Cone and Front Fork53
Front Suspension53
Fork Tube of Front Suspension53
Oil Seal54
Lower and Upper Tracks of the Steering Bearings55
Assembly Play56
Cylinder and Piston56
Small End - Wrist Pin - Roller Cage57
Piston - Wrist Pin57
Overhauling58
Carburettor Overhaul58
Overhauling of Drive Pulley with Speed Governor59
Overhauling of the Swinging Arm Anchorage, Dismantling59
Reassembly59
Central Stand Overhauling60
Removal of Central Stand Anchor Pin60
Reassembly and Caulking of Central Stand Anchor Pin60
Overhauling of Contact Breaker-Coils Unit60
Removal and Reassembly of the Security Lock61
Lubrication of Transmissions Sheaths62
Cable Harness from Chassis64
Painting64
Reassembly of Vehicles65
Notes Concerning Reassembly65
Locking Torques (Kgm)66
Reassembling Crankshaft68
Main Ball Bearings68
Crankshaft Alignment Check68
Crankcase Coupling68
Crankshaft Oil Seal on Crankcase Haives69
Piston - Wrist Pin - Cylinder - Cylinder Head69
Description of Timing Operations70
Checking Engine Timing of "SI" with Electronic Ignition71
D.C. Roller Bearing on Drive Pulley72
DC Roller Bearing on Speed Governor Clutch Weights Anchor Plate73
DC Roller Bearings on Rear Hub Housing, Half73
DC Roller Bearings on Rear Hub Housing, Half, Cover74
Mating of Hub Housing Half - Rear Hub Cover74
Swinging Arm - Rear Brake Jaw - Engine and Hub on Frame74
Transmission Belt Adjustment75
Front Suspension Disassembly75
Lower Track of Lower Steering Column Bearing76
Leg of Telescopic Fork76
Telescopic Fork77
Upper and Lower Track of Steering Column77
Ring Nut for Steering Column Upper Bearing77
Steering Upper Plate and Fork Upper Bracket77
Operations and Checks before Operating79
Automatic Mixer Dismantling81
Dismantling and Reassembling of Engine from Chassis81
Crankshaft from Crankcase, Half Engine Closing Side81
Electrical Equipment Diagram "Si" US Market82

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Vespa Si - Checking SI Engine Timing (Electronic Ignition)

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