Modern Vespa

Sun, 13 Feb 2022 07:01:17 +0000

Member

GT200

Joined: Tue, 18 Jan 2022 17:50:02 +0000
Posts: 15
Location: california

Member

GT200

Joined: Tue, 18 Jan 2022 17:50:02 +0000
Posts: 15
Location: california

Sun, 13 Feb 2022 07:01:17 +0000 quote

Need some help. Scoot started cutting out every now and then, but now won't restart at all once it cuts out for a few hours.
Symptoms:
1 - When on stand/parked... I start it and 30 seconds later it idles super high and rear wheel goes crazy fast
2 - I can start it now and then and ride it maybe 100ft and it cuts out and I cannot start it again. I have to push it home.
3 - terrible on gas and smells like gas
4 - gas leak/wet hoses coming from gas tap/petcock. I tightened hose clamps, but is still acting the same.
5 - I changed airfilter

I'm getting close to thinking it's a bad petcock. Any ideas?

grahamlml Sun, 13 Feb 2022 08:54:06 +0000 details Addicted Vespa GTS 250 , Baotian 70cc rat scooter, Yamaha V50M 1979 Joined: Sun, 21 Jan 2018 16:14:34 +0000 Posts: 530 Location: Wales
grahamlml Addicted Vespa GTS 250 , Baotian 70cc rat scooter, Yamaha V50M 1979 Joined: Sun, 21 Jan 2018 16:14:34 +0000 Posts: 530 Location: Wales	Sun, 13 Feb 2022 08:54:06 +0000 quote I would replace the petcock and if the vacuum and fuel lines bit old change them as well.

Fritz Katzenjammer Sun, 13 Feb 2022 09:41:16 +0000 details Addicted '07 GTS250ie "Mechanical Squirrel", '66 Honda Benly, '19 Suzuki 250 cafe "Mouse", '77 Jawa 350TS, '42 Henschel PzKw VI Tiger Joined: Fri, 01 Jul 2011 13:22:16 +0000 Posts: 894 Location: somewhere deep in the back of the garage...Burlington ONT.
Fritz Katzenjammer Addicted '07 GTS250ie "Mechanical Squirrel", '66 Honda Benly, '19 Suzuki 250 cafe "Mouse", '77 Jawa 350TS, '42 Henschel PzKw VI Tiger Joined: Fri, 01 Jul 2011 13:22:16 +0000 Posts: 894 Location: somewhere deep in the back of the garage...Burlington ONT.	Sun, 13 Feb 2022 09:41:16 +0000 quote I'm not familiar with the carb on these things, but I had very similar problems on a bike a few years back and the issue was a defective float. I'd check the float for damage or deterioration as well as the valve.

OP Wolvernerd Sun, 13 Feb 2022 15:55:38 +0000 details Member GT200 Joined: Tue, 18 Jan 2022 17:50:02 +0000 Posts: 15 Location: california
OP Wolvernerd Member GT200 Joined: Tue, 18 Jan 2022 17:50:02 +0000 Posts: 15 Location: california	Sun, 13 Feb 2022 15:55:38 +0000 quote I'll check the float, thanks. I hope it's nothing major. It was running great all this time Fritz Katzenjammer wrote: I'm not familiar with the carb on these things, but I had very similar problems on a bike a few years back and the issue was a defective float. I'd check the float for damage or deterioration as well as the valve.

Sun, 13 Feb 2022 16:42:38 +0000

Molto Verboso

2006 LX150 (carbed) | 2007 GT200

Joined: Wed, 29 Jun 2016 14:22:10 +0000
Posts: 1845
Location: Toronto

Molto Verboso

2006 LX150 (carbed) | 2007 GT200

Joined: Wed, 29 Jun 2016 14:22:10 +0000
Posts: 1845
Location: Toronto

Sun, 13 Feb 2022 16:42:38 +0000 quote

Wolvernerd wrote:

4 - gas leak/wet hoses coming from gas tap/petcock. I tightened hose clamps, but is still acting the same.

I'd start here, as this is definitely not right. The petcock is vacuum operated, and should block fuel when the engine is not running. It sounds to me like yours has failed and is flooding your bike.

p.s. you posted in wiki section, so your post is probably not getting as much attention as it normally would. Maybe ask a moderator to move it to "general"?

Sun, 13 Feb 2022 21:36:13 +0000

Member

GT200

Joined: Tue, 18 Jan 2022 17:50:02 +0000
Posts: 15
Location: california

Member

GT200

Joined: Tue, 18 Jan 2022 17:50:02 +0000
Posts: 15
Location: california

Sun, 13 Feb 2022 21:36:13 +0000 quote

Perfect, thank you so much. I will order the petcock and hoses.

berto wrote:

I'd start here, as this is definitely not right. The petcock is vacuum operated, and should block fuel when the engine is not running. It sound yo me like yours is failed and flooding your bike.

p.s. you posted in wiki section, so post is maybe not getting much attention. Maybe ask a moderator to move it to "general"?

Mon, 21 Feb 2022 03:31:09 +0000

Member

GT200

Joined: Tue, 18 Jan 2022 17:50:02 +0000
Posts: 15
Location: california

Member

GT200

Joined: Tue, 18 Jan 2022 17:50:02 +0000
Posts: 15
Location: california

Mon, 21 Feb 2022 03:31:09 +0000 quote

OK just did the following and my GT200 is back up and running like a champ.
1. Air filter - it was not too bad, but time for a change
2. Spark plug - the old one was completely burnt out
3. Fuel filter and fuel lines - not in bad shape, but lines were leaky at the petcock
4. Fuel pump - looked pretty warn, worth a change

I am however going to clean out the carburetor, to see if it gets better idle and performance, buy at least it's going steady again. Thank you all for your help!!!

Mon, 21 Feb 2022 06:12:49 +0000

Molto Verboso

2006 LX150 (carbed) | 2007 GT200

Joined: Wed, 29 Jun 2016 14:22:10 +0000
Posts: 1845
Location: Toronto

Molto Verboso

2006 LX150 (carbed) | 2007 GT200

Joined: Wed, 29 Jun 2016 14:22:10 +0000
Posts: 1845
Location: Toronto

Mon, 21 Feb 2022 06:12:49 +0000 quote

Wolvernerd wrote:

Great to hear! Well done!

pigletpilot

Mon, 21 Feb 2022 22:55:58 +0000