OP
Fri, 15 Sep 2023 22:39:05 +0000

Member
PX200 & PK125
Joined: Mon, 12 Jul 2010 09:20:26 +0000
Posts: 6
Location: Kent, England
 
Member
PX200 & PK125
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Posts: 6
Location: Kent, England
Fri, 15 Sep 2023 22:39:05 +0000 quote
Any comments/advice appreciated before I spend a fortune at the repair shop.

My 2009 GTS300 died on me yesterday. Was riding flat out at 80mph when revs dropped and when I pulled over it cut out. Restarted but with low power and dies again if I try to rev over about 3000rpm so limped home slowly. There is a knocking noise from either the bottom of the engine or behind the airbox - difficult to tell. No warning light at any time. Scoot was serviced a couple of months back with new belts rollers filter, fluids.

Any thoughts on what could be wrong? I am worried that the lack of warning light might mean nothing shows up on diagnostic tool and I can't afford to spend a fortune on mechanics looking for the problem.

Any help gratefully received
Fri, 15 Sep 2023 23:04:48 +0000

Veni, Vidi, Posti
LX190 Friday afternoon special, Primavera, some pushbikes
Joined: Fri, 12 Oct 2007 21:16:28 +0000
Posts: 9467
Location: Hermit Kingdom
 
Veni, Vidi, Posti
LX190 Friday afternoon special, Primavera, some pushbikes
Joined: Fri, 12 Oct 2007 21:16:28 +0000
Posts: 9467
Location: Hermit Kingdom
Fri, 15 Sep 2023 23:04:48 +0000 quote
First thing to check is the spark plug lead.
Fri, 15 Sep 2023 23:06:58 +0000

Ossessionato
2019 GTS300 Supertech E3 50,000km
Joined: Wed, 18 Nov 2020 02:36:54 +0000
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Location: Batmania aka Melbourne, Australia
 
Ossessionato
2019 GTS300 Supertech E3 50,000km
Joined: Wed, 18 Nov 2020 02:36:54 +0000
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Location: Batmania aka Melbourne, Australia
Fri, 15 Sep 2023 23:06:58 +0000 quote
cafcaddick wrote:
... limped home slowly. There is a knocking noise ...
knocking noise AND you rode home? sorry to say but that sounds like a not so good idea
Sat, 16 Sep 2023 02:41:37 +0000

Veni, Vidi, Posti
Joined: Sat, 22 Oct 2011 16:23:21 +0000
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Location: Tega Cay, SC
 
Veni, Vidi, Posti
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Location: Tega Cay, SC
Sat, 16 Sep 2023 02:41:37 +0000 quote
What's done is done. Check your oi and coolant. The noise may have come from the CVT - take the cover off and have a look. Check the air filter while you are there to see if it's all there.
Sat, 16 Sep 2023 04:05:18 +0000

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: Fri, 21 Oct 2005 19:59:19 +0000
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Location: The state of insanity, SoCal
 
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: Fri, 21 Oct 2005 19:59:19 +0000
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Location: The state of insanity, SoCal
Sat, 16 Sep 2023 04:05:18 +0000 quote
how many miles?

as mentioned above- check the oil, check the coolant see what's up there.

pop the bucket out and see if maybe something popped loose- ECU, HT lead, plug cap, evap or intake manifold is compromised.

pop the cover off and have a look see. maybe you got lucky and it's just a belt or clutch.

a repair shop should be able to determine fairly quickly if it's bad in a big ugly way, or if it's bad like just need some new parts or if it's an unknown issue that they need to chase down.
Sat, 16 Sep 2023 04:46:00 +0000

Ossessionato
GTS 300ie Touring 2013 - Signora D'argento & GTS 300ie HPE 2022 - Regina Arancione.
Joined: Sun, 03 Jun 2018 08:14:34 +0000
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Location: Lancaster, U.K.
 
Ossessionato
GTS 300ie Touring 2013 - Signora D'argento & GTS 300ie HPE 2022 - Regina Arancione.
Joined: Sun, 03 Jun 2018 08:14:34 +0000
Posts: 2071
Location: Lancaster, U.K.
Sat, 16 Sep 2023 04:46:00 +0000 quote
cafcaddick wrote:
Scoot was serviced a couple of months back with new belts rollers filter, fluids.
My money is there is an issue with the transmission. As greasy says, remove the cover and check both the variator and clutch nuts are torqued to spec and the belt is seated correctly.
OP
Sat, 16 Sep 2023 09:10:44 +0000

Member
PX200 & PK125
Joined: Mon, 12 Jul 2010 09:20:26 +0000
Posts: 6
Location: Kent, England
 
Member
PX200 & PK125
Joined: Mon, 12 Jul 2010 09:20:26 +0000
Posts: 6
Location: Kent, England
Sat, 16 Sep 2023 09:10:44 +0000 quote
Thanks for replies.

I will be spending today taking parts off to see if anything obvious. Only thing I've checked so far is oil and it wasn't that low.
Sat, 16 Sep 2023 10:46:05 +0000

Addicted
Piaggio Beverly 300 ie - 2012
Joined: Sun, 08 Aug 2021 16:36:14 +0000
Posts: 957
Location: Belgium
 
Addicted
Piaggio Beverly 300 ie - 2012
Joined: Sun, 08 Aug 2021 16:36:14 +0000
Posts: 957
Location: Belgium
Sat, 16 Sep 2023 10:46:05 +0000 quote
You say "it wasn't that low".
Was it still above "min"?
Sat, 16 Sep 2023 19:03:48 +0000

Ossessionato
2015 GTS 300 Super (Melody: 2015-2021, RIP), 2022 GTS SuperTech (Thelonica; bit the dust 02-22-23)
Joined: Wed, 22 Apr 2015 17:25:54 +0000
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Location: Asbury Park, NJ
 
Ossessionato
2015 GTS 300 Super (Melody: 2015-2021, RIP), 2022 GTS SuperTech (Thelonica; bit the dust 02-22-23)
Joined: Wed, 22 Apr 2015 17:25:54 +0000
Posts: 3910
Location: Asbury Park, NJ
Sat, 16 Sep 2023 19:03:48 +0000 quote
Whoo, does this sound familiar…

Several years back, I was riding from central New Jersey to NYC, I had a very similar experience rolling along the New Jersey Turnpike, forcing me to make a hasty run for the service shoulder, and a few frustrating phone calls for assistance. The culprit? a cracked, and eventually broken, fuel-injector body. This likely happened a month or so before when I hit a crater-class pothole riding under the Brooklyn-Queens Expressway. There actually were a few minor telltale signs up to the moment of complete failure, but they were minor enough for me not to take too much heed. Rookie mistake.

So, among other things to have looked at, make sure the injector is given a once-over.


August, 2020: Vespa No.1 (Melody), historically recorded as Misdadventure No.1

Sun, 17 Sep 2023 16:24:20 +0000

Addicted
Piaggio Beverly 300 ie - 2012
Joined: Sun, 08 Aug 2021 16:36:14 +0000
Posts: 957
Location: Belgium
 
Addicted
Piaggio Beverly 300 ie - 2012
Joined: Sun, 08 Aug 2021 16:36:14 +0000
Posts: 957
Location: Belgium
Sun, 17 Sep 2023 16:24:20 +0000 quote
cafcaddick wrote:
Thanks for replies.

I will be spending today taking parts off to see if anything obvious. Only thing I've checked so far is oil and it wasn't that low.
I don't know what you have found so far.
But I would put the Vespa on the center stand, start the engine and rev it.

On the center stand with the rear wheel off the ground the engine does not get the power load of the transmission.

If the engine revs normally very probably there is an issue with the transmission.
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