Fri Sep 23, 2022 5:43 am

Molto Verboso
2018 Vespa 300 GTS Touring
Joined: 04 Oct 2015
Posts: 1160
Location: NYC
 
Molto Verboso
2018 Vespa 300 GTS Touring
Joined: 04 Oct 2015
Posts: 1160
Location: NYC
Fri Sep 23, 2022 5:43 am linkquote
So my GTS300 has been misbehaving the last few months with regards to starting.
The battery is fine, the fuel pump is fine, fuses are fine etc. All the normal things that could cause the issue were checked out and all seemed to be ok. The brake light switch is functioning properly. The side stand switch has been disabled all along since I have had this Vespa.
The last step was to clean the kill switch and see if that fixed the issue.
Took the headlight assembly off got the switch out, cleaned it with contact cleaner as best as one could, then connected it back and used dielectric grease etc etc..
The problem reappeared again.
It will occur again randomly i.e. could have driven for 45 mins and parked and come back 30 mins later & it wont start.
What says I am stupid is while I had it all open I did not bother to clean the ignition switch, just put dielectric grease in all the contact points.
Now I have ordered a replacement kill switch, and a ignition switch and in the meantime pray that it starts up.
Just know that when you have things open clean everything that can be cleaned even if they dont need to be cleaned, dont be stupid like moi...
Fri Sep 23, 2022 6:05 am

Hooked
Vespa ET4
Joined: 16 Feb 2022
Posts: 120
Location: Sheffield England
 
Hooked
Vespa ET4
Joined: 16 Feb 2022
Posts: 120
Location: Sheffield England
Fri Sep 23, 2022 6:05 am linkquote
Welcome to my world , I am quite often " wise after the event" .
Fri Sep 23, 2022 6:16 am

Ossessionato
Vespa LX150 GTS250ie GTS300x2 sold 'em
Joined: 11 Dec 2009
Posts: 2296
Location: St. Pete, Fla
 
Ossessionato
Vespa LX150 GTS250ie GTS300x2 sold 'em
Joined: 11 Dec 2009
Posts: 2296
Location: St. Pete, Fla
Fri Sep 23, 2022 6:16 am linkquote
Don't forget that the brakes play a role in the starting procedure.
Fri Sep 23, 2022 6:36 am

Enthusiast
Stella
Joined: 28 Jan 2012
Posts: 77
Location: USA
 
Enthusiast
Stella
Joined: 28 Jan 2012
Posts: 77
Location: USA
Fri Sep 23, 2022 6:36 am linkquote
Dielectric grease? Oh dear.
Fri Sep 23, 2022 6:40 am

Hooked
2020 primavera 150
Joined: 08 Aug 2020
Posts: 419
Location: Lorton virginia
 
Hooked
2020 primavera 150
Joined: 08 Aug 2020
Posts: 419
Location: Lorton virginia
Fri Sep 23, 2022 6:40 am linkquote
Joint the crowd
Fri Sep 23, 2022 10:16 am

Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
Joined: 29 Dec 2007
Posts: 12818
Location: Oregon City, OR
 
Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
Joined: 29 Dec 2007
Posts: 12818
Location: Oregon City, OR
Fri Sep 23, 2022 10:16 am linkquote
redstella wrote:
Dielectric grease?
Always an important item in my scooter tool kit, RV tool kit, and boat tool kit.
Fri Sep 23, 2022 11:48 am

Grumpy Biker
1980 Vespa P200e (sold), 2002 Vespa ET4 (sold), 1949 Harley-Davidson FL
Joined: 27 Oct 2009
Posts: 4983
Location: Sparks, Nevada, USA
 
Grumpy Biker
1980 Vespa P200e (sold), 2002 Vespa ET4 (sold), 1949 Harley-Davidson FL
Joined: 27 Oct 2009
Posts: 4983
Location: Sparks, Nevada, USA
Fri Sep 23, 2022 11:48 am linkquote
You didn't really describe in detail "how" it won't start. Does the starter engage and turn the engine but it won't light? Or when you press the start button to you get nothing (starter does not engage).

If the starter is not engaging, I'd be looking at the start solenoid as a possible problem point. These solenoids have a tendency to start sticking and not engaging the starter as they age.

-Craig
Fri Sep 23, 2022 12:43 pm

Molto Verboso
2018 Vespa 300 GTS Touring
Joined: 04 Oct 2015
Posts: 1160
Location: NYC
 
Molto Verboso
2018 Vespa 300 GTS Touring
Joined: 04 Oct 2015
Posts: 1160
Location: NYC
Fri Sep 23, 2022 12:43 pm linkquote
caschnd1 wrote:
You didn't really describe in detail "how" it won't start. Does the starter engage and turn the engine but it won't light? Or when you press the start button to you get nothing (starter does not engage).

If the starter is not engaging, I'd be looking at the start solenoid as a possible problem point. These solenoids have a tendency to start sticking and not engaging the starter as they age.

-Craig
The starter doesn't engage period. The brake switch is fine based on the fact that brake lights light up, toggling kill switch doesn't have an effect or if it does it doesn't get known right away. Pressing the starter switch does nothing, then by the power of gray skull it will magically start up. But this doesn't happen every time. Happens ever so often when ya least expect it, had to leave the Vespa in Manhattan a few times and come back the next day as it wouldn't start.
I will check the solenoid(relay) and report back, in the meantime I have an order in for new switches.
Fri Sep 23, 2022 3:23 pm

Veni, Vidi, Posti
LX190 Friday afternoon special, Primavera, some pushbikes
Joined: 12 Oct 2007
Posts: 8388
Location: Hermit Kingdom
 
Veni, Vidi, Posti
LX190 Friday afternoon special, Primavera, some pushbikes
Joined: 12 Oct 2007
Posts: 8388
Location: Hermit Kingdom
Fri Sep 23, 2022 3:23 pm linkquote
Is the starter motor getting 12v when this occurs?
Fri Sep 23, 2022 3:26 pm

Addicted
2019 Piaggio Liberty 150
Joined: 20 Feb 2019
Posts: 961
Location: Norfolk, VA
 
Addicted
2019 Piaggio Liberty 150
Joined: 20 Feb 2019
Posts: 961
Location: Norfolk, VA
Fri Sep 23, 2022 3:26 pm linkquote
What does the anti-theft red light do when this is happening? Could be a failing key chip reader. My Liberty did something very similar while the ring was failing. Finally got stranded.

I'm pretty sure you had the battery checked/tested. If not test it just to be sure.
Fri Sep 23, 2022 3:48 pm

Enthusiast
2017 Piaggio BV 350
Joined: 13 Jul 2018
Posts: 80
Location: Buford, GA
 
Enthusiast
2017 Piaggio BV 350
Joined: 13 Jul 2018
Posts: 80
Location: Buford, GA
Fri Sep 23, 2022 3:48 pm linkquote
Sounds like a Vespa to me! My Piaggio does so many random things. I love riding my BV350, but man it can be frustrating to own. I wish there was comparable Japanese scooter, but there isn't.
Fri Sep 23, 2022 4:02 pm

Hooked
Primavera
Joined: 02 Aug 2022
Posts: 114
Location: SoCal
 
Hooked
Primavera
Joined: 02 Aug 2022
Posts: 114
Location: SoCal
Fri Sep 23, 2022 4:02 pm linkquote
chickdr wrote:
Sounds like a Vespa to me! My Piaggio does so many random things. I love riding my BV350, but man it can be frustrating to own. I wish there was comparable Japanese scooter, but there isn't.
Vespa's are quirky, seems they run the best if they are ridden and tinkered with on a daily basis.

Japanese engineering is the best but majority of their modern motorbikes look like insects.
IMO 90s era was the heyday for their motorcycle styling.


Modern Japanese bike, on the kickstand it even leans to the drain plug side

Fri Sep 23, 2022 11:23 pm

Member
2018 GTS 300 Super Sport (Grey)
Joined: 11 Dec 2018
Posts: 21
Location: Surrey, England
 
Member
2018 GTS 300 Super Sport (Grey)
Joined: 11 Dec 2018
Posts: 21
Location: Surrey, England
Fri Sep 23, 2022 11:23 pm linkquote
You are describing almost word for word my own situation and read on another thread that it could be the immobiliser antenna not reading the key, so found another thread on here that details the flashing light and what it means.

I've printed it out and put it in the glovebox so the next time it happens I can check the red light - but my simple understanding is that it needs to go out to allow the scooter to start.

Be great if you could come back on this thread as you go, as this sounds like something a number of us suffer from and like so many things in life, there is more than one cause!

Good luck 😊
Sat Sep 24, 2022 9:35 am

Molto Verboso
2018 Vespa 300 GTS Touring
Joined: 04 Oct 2015
Posts: 1160
Location: NYC
 
Molto Verboso
2018 Vespa 300 GTS Touring
Joined: 04 Oct 2015
Posts: 1160
Location: NYC
Sat Sep 24, 2022 9:35 am linkquote
I am going to pay attention to the blinking red light just cuz I wasn't aware until I read this here now. I checked the starter relay (solenoid) for noise, did not hear anything, but then again the engine started up.
So far the engine has started up fine since I wrote the post. Murphy's law will work its way I believe.
I was informed that the ignition switch and kill switch are on back order won't be getting it for another 6-8 weeks. Will hope I may find that they aren't the cause of this misbehavior and it will all be back to being merry.
In the meantime I have to get a torx coarse thread screw for the headlight assembly as the one that goes in there fell down the tubes (yes I had a magnetic torx screw etc but it fell while I was trying to thread it back in, also a 9mm socket fell in as I was undoing a nut that the ground for the heated grips connects too.
I wonder if there is a easy way to retrieve any of these things from the floorboard or one has to take the glove box off along with the other accouterments that adorn the floor i.e battery cover etc...
The subject heading says : You know you are stupid, for a reason lol...
Sat Sep 24, 2022 4:36 pm

Addicted
2019 Piaggio Liberty 150
Joined: 20 Feb 2019
Posts: 961
Location: Norfolk, VA
 
Addicted
2019 Piaggio Liberty 150
Joined: 20 Feb 2019
Posts: 961
Location: Norfolk, VA
Sat Sep 24, 2022 4:36 pm linkquote
I'm the dumb one. I called it a key chip reader, the proper name is a Immobilizer Antenna. A $20 part kicked me silly. I have a spare one now in my tool box just in case the same thing happens again.
Sat Sep 24, 2022 10:42 pm

Member
2018 GTS 300 Super Sport (Grey)
Joined: 11 Dec 2018
Posts: 21
Location: Surrey, England
 
Member
2018 GTS 300 Super Sport (Grey)
Joined: 11 Dec 2018
Posts: 21
Location: Surrey, England
Sat Sep 24, 2022 10:42 pm linkquote
baba12 wrote:
I am going to pay attention to the blinking red light just cuz I wasn't aware until I read this here now. I checked the starter relay (solenoid) for noise, did not hear anything, but then again the engine started up.
So far the engine has started up fine since I wrote the post. Murphy's law will work its way I believe.
I was informed that the ignition switch and kill switch are on back order won't be getting it for another 6-8 weeks. Will hope I may find that they aren't the cause of this misbehavior and it will all be back to being merry.
In the meantime I have to get a torx coarse thread screw for the headlight assembly as the one that goes in there fell down the tubes (yes I had a magnetic torx screw etc but it fell while I was trying to thread it back in, also a 9mm socket fell in as I was undoing a nut that the ground for the heated grips connects too.
I wonder if there is a easy way to retrieve any of these things from the floorboard or one has to take the glove box off along with the other accouterments that adorn the floor i.e battery cover etc...
The subject heading says : You know you are stupid, for a reason lol...
I purchased an LED bulb upgrade from Scooterwest (front, rear and rear running lights plus brake light modulator) and Robot had created brilliant "how to" videos for each part.

When discussing the removal of the dreaded screw he advised dipping the screwdriver in grease to help adhere the screw.

I did everything he said and STILL managed to drop it in!

I virtually stripped the scooter to bits and never found it so guessing it's still in there somewhere.

I've got to do the same thing again to replace the leg shield trims (changing to black) and it's the only thing I'm totally terrified of!

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