300 GTS Super Ignition or Kill Switch problem???
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Lurker
Vespa 300 GTS Super
Joined: 16 Jul 2019
Posts: 4
Location: Utah
Tue Jul 16, 2019 11:00 am quote
Two weeks ago, my Ves 300 GTS Super started one day and the next day, when I went to start it, it wouldn't start. Battery had been very recently replaced, and the lights on the dash were on. I turned the kill switch on and off a couple of times, still wouldn't work.

Today, 2 weeks later, I tried to start it and it started fine. Rode it for a half hour, and parked it. Went out an hour later and it would not start.

Any ideas?

Thanks.
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 37557
Location: Pleasant Hill, CA
Tue Jul 16, 2019 11:25 am quote
What model year is your 300? It might be subject to the fuel pump recall if it's nine or ten years old.

By 'wouldn't start' I assume you mean it turns over but doesn't fire up.
Lurker
Vespa 300 GTS Super
Joined: 16 Jul 2019
Posts: 4
Location: Utah
Tue Jul 16, 2019 1:10 pm quote
It is a 2010 model with about 8000 miles on it. Sorry I wasn't clear. It would not even turn over, even though there was power to the lights and instruments on the dashboard. Doesn't seem like a fuel pump issue, but it could be.
Enthusiast
2012 LX150ie
Joined: 28 Jul 2018
Posts: 88
Location: Austin Texas USA
Tue Jul 16, 2019 2:12 pm quote
When it didnít turn over
Was the brake light on? There is an interlock that prevents the bike from starting unless you are squeezing the brake lever.
Lurker
Vespa 300 GTS Super
Joined: 16 Jul 2019
Posts: 4
Location: Utah
Tue Jul 16, 2019 2:15 pm quote
Yes. Had the left brake on with the key turned on. Did not see if the brake light was on.
Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Posts: 37557
Location: Pleasant Hill, CA
Tue Jul 16, 2019 2:15 pm quote
stancrump wrote:
It is a 2010 model with about 8000 miles on it. Sorry I wasn't clear. It would not even turn over, even though there was power to the lights and instruments on the dashboard. Doesn't seem like a fuel pump issue, but it could be.
Not the fuel pump then.

Check kill switch!
Check brake light comes on
Check all fuses

Can you hear the fuel pump at switch-on? If not, swap out the 'injection loads' relay.

If the fuel pump whirrs for two secs at switch-on, check the starter relay.
Lurker
Vespa 300 GTS Super
Joined: 16 Jul 2019
Posts: 4
Location: Utah
Tue Jul 16, 2019 2:30 pm quote
Thanks! I will try those and let you all know what happens.
Molto Verboso
'08 Gunuine Buddy 150 St Tropez 'Simon' '04 Honda Metropolitian 'Archie' [Sadly had to trade it away ;-( ]
Joined: 23 Dec 2010
Posts: 1112
Location: Depends on where I happen to be.
Fri Jul 19, 2019 6:42 am quote
stancrump wrote:
Yes. Had the left brake on with the key turned on. Did not see if the brake light was on.
Try the other brake, left side switch could be malfunctioning.
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