VESPA GT 200, Workshop Manual

Page: 6 / 287

6
7.12 Spark Advance Variation Curve 69
7.13 Evaporative emission system 70
Checking the CO Concentration 71
7.14 SAS (Secondary Air System) 73
7.14.1 General 73
7.14.2 Description 73
7.14.3 Removing the SAS 74
8 Troubleshooting 77
8.1 Engine 77
8.1.1 Poor Performance 77
8.1.2 Rear Wheel Spins at Idle 78
8.1.3 Rich Mixture 78
8.1.4 Weak Mixture 79
8.1.5 Low Compression 79
8.1.6 Starting Problems 80
8.1.7 Excessive Oil Consumption/Excessive Smoke from Exhaust 81
8.1.8 Insufficient Lubrication Pressure 81
8.1.9 Engine Tends to Cut Out at Full Throttle 82
8.1.10 Engine Tends to Stop at Idle 82
8.1.11 Excessive Fuel Consumption 83
8.2 Transmission and Brakes 83
8.2.1 Irregular Clutch Operation or Grapping 83
8.2.2 Poor Braking Performance 84
8.2.3 Brakes Overheating 84
8.3 Electrical System 85
8.3.1 Battery 85
8.3.2 Turn Signal Lights Not Working 85
8.4 Steering Controls and Suspension 85
8.4.1 Excessive Steering Stiffness 85
8.4.2 Excessive Steering Play 85