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So I had an ET4 for a couple of months. It has always been a bad starter. It will not start at all from the kick start. Sometimes it starts straight away - but if I am not careful it can die again, and then it is hard to start again. However, whenever it is started, I have to twist the throttle back slowly until revs build, if I do it too quick it will die. Even while riding, if I let the revs off to slow down and then go to pull away quickly the engine can cut out - so always need to be gentle with throttle which is not good at junctions when I need to be quick off the mark etc.

To top it all, I tried to start it yesterday, and it started straight away, but then it died and would not start again, I ended up draining the (fairly new) battery. I had the old battery fully charged spare so I popped that in. I then tried to start it and after turning over a couple of times the starter stopped completely. The lights etc all work and when pressing the start button I can hear the switch next to the battery - but that's it.

I did notice the battery had water condensation on it. Have I shorted something?

Really grateful for any help. Cheers

J
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Sounds suspiciously like the auto choke not working.

You being in Brighton I'd ordinariy offer to drop in and have a look but it's the week before Christmas and I'm a self employed electrician. You can guess how much free time I have.

There's an ET4 tech manual on here somewhere. That should explain the operation of the choke and how to test it.

A simple method is to block the air intake with your hand and see if it starts up normally.
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That was quick - cheers. I found the manual so will check out the choke. Really appreciate the advice.

J
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Hard to start and poor cold running, with a tendency to stall at idle? Classic symptoms of the valves needing adjusting. It's not always the cause, but unless you've had it done you'll never know.
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Thanks, sounds like I may need to take it in! Anyone got any advice about the factor the starter isn't working now?
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Jim's right. The choke is probably easier to check first, though.

If all else fails, Kevin at CD scooters knows the insides of Piaggio auto engines intimately.
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When you've re-charged the original battery, I bet it'll get the starter working. The old battery may well have a shorted cell or a higher than normal resistance, which will light the lights just fine, but fail to turn the starter over - you'll just hear the click of the relay.
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Yeah, I will try having a look at the choke - CD scooters is literally just down the Road from me,
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Yeah cheers Jim, that's exactly what I hear. My new battery will be charged by tomoz.
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Jrebera wrote:
Yeah, I will try having a look at the choke - CD scooters is literally just down the Road from me,
If you venture down there tell Kevin that Ged sent you...that should get you kicked out and locked out! Laughing emoticon
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So I mention your name and they put the price up right?
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Nope you mention I sent you and the price stays the same...for you.

It's me that gets the credit and brownie points for next time.

Kevin's a great guy, really.
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Cool, when I go I will def tell them you sent me!

J
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This thread right here is what makes modernvespa.com just about the best forum online.

Such awesome resources, from people that are so genuine.

Seasons greetings, one and all.
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OK, So I have fully charged my battery. I switch on the ignition, the lights come on. when I try the electric start I hear the relay switch clearly but it seems nothing at all is getting to the starter motor. The lights do NOT dim at all.
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OK, so no current is flowing through the relay to the starter motor. This could be:
Relay contacts dirty and pitted (easily cleaned, though a replacement is very cheap).
Big red cable connections to the relay dirty, corroded or fallen off.
Bad +ve connection to the starter.
Worn or stuck brushes or dirty commutator in the starter motor.
Poor grounding of the engine - have you had the transmission cover off recently?
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Thanks, I took the relay switch to CD scooters (cheers GED!) and they tested it and it worked fine, but they told me it is a relay switch for the lights! So they gave me the correct unit, hay presto! It works!

Thanks so much for your help, really, really appreciate it - I'm back on the road!
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Good news... One of the reasons I love this site .. Someone somewhere always has answers or can help no matter how obscure the problem

Clap emoticon
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Well fixed.
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Well pleased - scooting around happy as larry, zipping here and zipping there all day. Thanks again all!
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This is great news!

Does Kevin still have a couple of ET4s for sale in the shop did you see?
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Yeah, I think he did have one. I can double check tomoz if you want coz I'm just down the Lewes Rd ad will be passing by CD's tomoz.
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