Question about Vespa ET4 125 Motorcycles

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I have an ET4 Vespa which wasn't used at all last year. Of course I had to replace the battery. The lights come but it won't start - not even a rumble. Battery is fine. Any advice?

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  • Vespa Master
  • 706 Answers

Perhaps something wrong with the (coded) key - it has probably to be reprogrammed
the brown is the master key & the blue the normal onel
-try the brown rone first!
I have an ET4 Vespa which wasn't used at all last - et4-vespa-wasnt-used-all-last-oxxohgzh41u34mrctauxw1ux-2-0.jpg

Posted on Nov 29, 2014

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 16 Answers

SOURCE: vespa et4 125 cuts out after starting and riding for a few yards

before buying a new HT coil (as these are generally bullet proof on an et), remove the inspection panel and disconnect the spark cap. secure something long, thin and metal into the cap ( screw, tweezers, etc) and position it with a slight gap to the frame. disable the immobiliser and use the kick start. you should see the spark jumping from the metal to the metal frame. I fyou see this spark, it is most likely that the HT coil is fine.

Sometimes the diaphragm in the fuel tap can go wonky on an ET also, meaning that it might start alright but after going for a while, once the carb drains, the engine will die from fuel starvation. to test the fuel tap, remove the 2 tubes that run from the fuel tap to the carb at the carb end and **** lightly on the thin one. you will feel the daphragm open and fuel will run from the fatter tube if it is working.

Another thing that might happen if it is running for a while then dies is that the carb might be allowing too much fuel to the engine and flooding it. If when it restarts, there is a lot of smoke from the exhaust it could indicate this. leave it tick over for a while to run off the worst of it then increase the throttle slowly until you hit full throttle, leave it run back down to idle and you should be set to go. only use the throttle lightly and go slowly and it should bring you home at least then adjust your carb.

Posted on Aug 23, 2009

  • 8404 Answers

SOURCE: No power with a brand new battery, not even ignition lights

Did you check your brand new battery? Fully charged? Hydro was good? You are connected properly ( + = + and - = - ) Do a volt check yourselg between + and - (frame)

If yes to all, Id be looking at the ignition switch.

Posted on Sep 07, 2009

bonedivers
  • 1140 Answers

SOURCE: Rode my motorcycle about 50

doesn't sound like it with bright headlamp. what about your kill switch? my kill switch wire broke while riding, did same thing.

Posted on May 20, 2011

  • 339 Answers

SOURCE: scooter sat for a year;

after a year sitting idle chances are that the gas inside the carb has degraded and the carb will need cleaning also when you filled the tank did you remove any old fuel? if not the its contaminated with the old gas
give it a full service new feul clean carb clean air filter then it should start

hope this helps

john

Posted on Jul 01, 2011

caroldon
  • 17129 Answers

SOURCE: VESPA 2008 LX 50.Will not

The poor performance of the engine can makes these faults to come up. we need to check from the fuel tank , check if the fuel contains impurities and specially water. If so this can come up when the tank gets empty and produce misfiring, splutter and jerks. So a check on the fuel filter will confirm this as it will be seen, if so remove and clean tank and change the filter. We then come to the carburetor as the fuel mixing is determined in this section. You need to have the carburetor removed and all ports washed and cleaned if there is traces of dirt or clogging noticed in the fuel chamber.

Secondly we need to check on the electrics. The spark intensity is most important .Remove the plug to check gap and condition of plugs. The black plug indication will confirm that the performance is bad whereas a fully fired plug without deposits must be the ideal view. Check the HT coil and the HT wires, if the intensity is bad the ignition system must be checked. DO NOT CHANGE any part without a confirmation--- trying with a replacement from another vehicle. Finally the LT trigger to the coils must be checked be it from the platinum points or an electronic ignition unit. The voltage of the trigger must be high to give the best HT output.

Finally check the Timing on the engine. Also check compression of engine since you experience starting fault.

Thank you for using Fixya

Posted on Sep 13, 2011

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1 Answer

Vespa et4 fuse box location


The Vespa ET4 has fuses on 3 different locations....
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The Vespa ET4 has fuses on 3 different locations....
1) under the cover on the front shield
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3) under the helmet box
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fuse-box-vespa-et4-sxbikrkt5iu1vmjxkjitshw2-5-0.jpg
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Hi, Paul and the usual suspects are:
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2. Damaged or restricted fuel tank venting system.
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4. Vacuum piston malfunction.
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Hi, Kermithefrog and the usual suspects are:
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1 Answer

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fuses-et4-125-wrvo0vnsxenp22qrsalmbzkb-3-0.jpg fuses-et4-125-wrvo0vnsxenp22qrsalmbzkb-3-2.jpg fuses-et4-125-wrvo0vnsxenp22qrsalmbzkb-3-5.jpg

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