VESPA ET4 50 Technical Information

Vespa Assistenza -1- August, 2002 PIAGGIO USA, Inc. Training Material for Vespa ET2/ET4 INDEX FAULT FINDING...

Vespa Assistenza -10- August, 2002 WHAT TO DO IF YOU NEED TO CHANGE AN ET4 LOCK BARREL IF YOU DO NOT HAVE THE ORIGINAL RED KEY: If you do not hav

Vespa Assistenza -11- August, 2002 L.E.AD.E.R. 1 50cc IGNITION/CHARGING

Vespa Assistenza -12- August, 2002 ET2 CHARGING CIRCUIT Note: oil light remains alight for 15 seconds after turning ignition on • Alternator stat

Vespa Assistenza -13- August, 2002 ET2 & ET4 FUEL GAUGE SENDER AND CIRCUIT

Vespa Assistenza -14- August, 2002 L.E.AD.E.R. 150cc ENGINE SECTION

Vespa Assistenza -15- August, 2002 VESPA ET2 CRANKSHAFT COMPONENTS (Range 3.9) • Crankshaft spline length from shoulder at main bearing to the end

Vespa Assistenza -16- August, 2002 ET2/4 SPECS. CHART

Vespa Assistenza -17- August, 2002 ASSISTENZA TE CHNICAL INFORMATION BULLETINS NUMBER 001, OCTOBER 2001 Vespa ET4 sealed battery It has come to our

Vespa Assistenza -18- August, 2002 NUMBER 002, OCTOBER 2001 Vespa ET2 & ET4 carburetors We have noticed an increasing number of carburetor chan

Vespa Assistenza -19- August, 2002 ET4 Carburetor Problems Symptoms: Vespa will st art and idle but dies as soon as the accelerator is turned. Thi

Vespa Assistenza -2- August, 2002 CDI. ... ... ...

Vespa Assistenza -20- August, 2002 NUMBER 003, OCTOBER 2001 Programming ET4 immobilizer system We have had a few questions lat ely on how

Vespa Assistenza -21- August, 2002 7. Turn the key to the “ On” position. 8. Turn the key “ Off’ when the LED comes on. 9. Remove the blue k

Vespa Assistenza -22- August, 2002 NUMBER 004, DICEMBER 2001 Vespa ET2 spare parts catalog update On page 28, table 7 has been updat ed to reflect

Vespa Assistenza -3- August, 2002 FAULT FINDING ENGINE RUNNING RICH SYMPTOMS. • Vehicles will not start or has cut out and will not restart - The

Vespa Assistenza -4- August, 2002 AUTOMATIC CHOKE OPERATION The automatic choke units used on Vespa motor scooters are both basically the same and

Vespa Assistenza -5- August, 2002 Diagram 1 – Choke unit operation To check the choke circuit. Refer to diagram 2 for ET2. Diagram 3 for ET4 1. F

Vespa Assistenza -6- August, 2002 Diagram 3 – Choke unit power supply. Vespa ET2 Note. Choke units all look much the same but are different and it

Vespa Assistenza -7- August, 2002 150cc L.E.AD.E.R. Engine IGNITION, CHARGING & IMMOBILIZER Use these not es in conjunction with the cir cuit d

Vespa Assistenza -8- August, 2002 TESTING. Immobilizer. • Normally use the blue key for testing. • The diagnostic test socket is on the ri

Vespa Assistenza -9- August, 2002 Stator. Any yellow-to- yellow should give continuity. Yellow to ground should not give continuity. CDI. Note that