Modern Vespa

I have a 2012 Vespa LX 50 2T.
I was, and am, having some issues with the engine cutting out after being on the road for 10-15 minutes. It also was taking a long time to start from time to time.
From the various posts I had read pertaining to this issue, what I gleaned was that the culprit is usually a bad CDI and/or carburetor.
So...I replaced the existing CDI unit with a new one and the scooter starts up right away now, but....today when I took the short ride to the market, it died after about 4 minutes. Needless to say it is a royal pain to have to walk the scooter back to my house !

I did order a new carburetor, but it will not arrive for about 10 days. There is only one Vespa dealer here in Tahiti and they did not have the carburetor in stock, so I ordered one for SIP in Germany.
Anyway....very frustrated with my dilemma, needless to say.
Anyone here have any other thoughts or suggestions ? I did replace the fuel and vacuum lines as well, so that box has been ticked.

Perhaps it will be mitigated after installing the new carburetor?
Thanks in advance.

Seems like a carb problem. what have you ordered and what is the old one ?

Peace

Did you inspect the evap system and canister ?

how many miles?

what kind of service history? any repairs?

what spark plug and cap are you running, what type of oil?

when it cuts out, does it do so abruptly or does is kind of sputter and die?

Hey guys, thanks for the comments. I am on Tahiti time, hence the somewhat late response
The carb I ordered was the same as the original Dellorto PVHA 17.5. Regarding the miles, or kilo's since I am in that part of the world, the scooter has accrued 9900 km. Not a lot, seems to me, for a 11 year old scooter.

Service history: just the basic prescribed recommendations, no major repairs.
Same with the oil and spark plug...just what is called out in my service manual.
Regarding cutting out, definitely sputtered to a stop...a slow death

Mr. Nice, I am clueless to the evap and canister.. I will need to research that. I am an architect, but I know squat about engines, etc
Thanks again for your thoughts...

because it doesn't abruptly cut out, it's more likely mechanical rather than electrical.

I'd run it back to checking the basics:
-fuel: check the fuel line, fuel tap is operating properly, tank is vented
-vacuum: check the vacuum line and intake manifold for splits, breaks& tears
-auto choke: confirm operation.
-spark: fresh plug, big, bright, snappy blue spark (check cold and check hot), same with the plug cap. if it looks suspect, swap it. but be sure to check hot and cold operation.

-compression test: you should be up in the 150 range, with 115 being the minimum

-exhaust: make sure that it's free flowing, a clogged exhaust will absolutely hamper performance.

the carb may be your problem, so I don't see much harm in just snapping a new one on. but this might mask an underlying issue.

don't worry about evap, you don't have it on your bike.

greasy 125
That is quite the laundry list, but I get
As mentioned, dealing with an engine is really not in my wheel house. That said, there is a local mechanic here on Mo'orea island who seems to be 'fairly competent', so I can take the Vespa to him WITH your suggestions...in French of course He doesn't speak any English.

Oh....one other item that I did not mention...after the scooter slowly died when I was in flight, it would eventually restart after a few minutes. So that may be a clue?

the absolute first thing I do with ANY ET2 is to check the compression. too many of them have been run without oil and junked up the top end.

an ET2 will take an absolutely criminal amount of abuse before giving up the ghost, and this includes running it without oil and seizing the piston in the bore. the funny thing about a seize is, sometimes if you let it cool off it'll just start right up again...

which leads me to the oil pump... is belt driven. off of the crank shaft, behind the transmission belt. this is a wear item that is frequently overlooked and they fail from not only mileage but heat cycles and deterioration of the rubber. so if that's never been checked or replaced? there's a possible culprit.

anyway, I'd take the laundry list to your guy. but let him work his own magic, everybody has their own approach.

personally, I'd check everything and hope I found the cause. if not I'd ride it till it quit and then do my checks and see if it's something caused by a component heating up.

Actually my old pump was leaking big time, so I replaced it about 5 months ago with a new one....so I dont think that is an issue...?

Well...just a brief follow up. I got proactive today and, after watching several YouTube videos on removing and cleaning my carburetor....I am really pleased to report the Vespa is running very very smoothly at long last. I was stunned when I took it for a brief test drive after reinstalling the carburetor.IT was purring!!
I am a happy man.

I didn't have any carb cleaner, but I did have a can of compressed air, which I know is probably not ideal when cleaning a carburetor, but better than nothin' I suppose. Obviously it worked.
I do have a new carb arriving in about a week or so...I guess it doesn't hurt to have a spare until the day when mine really does finally crash and burn.

Thanks again to all of you for the tips, etc. I did learn a few things.
As we all know....Knowledge is King!!