Vespa gts 125 2008 carburetor versjon wont start

[tomk]

Hello

Desperate for help, have tried allmost everthing, really confused.

Scooter is hard to start or won't start when cold, i have got it running a few times last 2 weeks. When it eventuelly starts i leave it for a few minutes at low rew and then it Runs fine on normal driving, but stalls when pulling trottle too fast. Carb cleaned in ultasonic bath, fuel pump checked, choke changed, sparkplug changed, new batteri, compression fine. Fuses is fine, no error codes. Valves checked.
Anyone have any idea, really confused ?

[alan34]

Hello there trouble sounds fuel related has it got a fuel filter might need changing.any fuel lines kinked let us know how you get on good luck with it alan.

[alan34]

Hello forgot to say when it wont start put plug in holder and earth to clean metal to see if it is sparking.if its sparkling pour some petrol down plug hole replace plug and cap then try to start it .

[adrian]

Have you removed carb to manifold rubber pipe ? Had a similar problem with the girlfriend's gts125, the carb rubber had a small split, so it's worth checking

[tomk]

Jun 21, 2021 19:06:40 GMT adrian said:

Have you removed carb to manifold rubber pipe ? Had a similar problem with the girlfriend's gts125, the carb rubber had a small split, so it's worth checking

Spark was one of the first things i checked, nice blue spark, fuel filter removed,fuel pump tested,all fuel line checked.

[adrian]

Jun 21, 2021 20:39:51 GMT tomk said:

Jun 21, 2021 19:06:40 GMT adrian said:

Have you removed carb to manifold rubber pipe ? Had a similar problem with the girlfriend's gts125, the carb rubber had a small split, so it's worth checking

Spark was one of the first things i checked, nice blue spark, fuel filter removed,fuel pump tested,all fuel line checked.

the rubber pipe that joins carb to engine ?

[shaunbond]

I think tight valve clearances have similar symptoms. Might be loose but check with Google.