OP
@oscarsass avatar
UTC

Hooked
Joined: UTC
Posts: 434
 
Hooked
@oscarsass avatar
Joined: UTC
Posts: 434
UTC quote
Took the ET2 for an errand this morning. It goes very well - point, shoot, then brake hard. Cracking.

There's a problem - this has only ever happened twice but never got to the bottom it.

On a hot day (yes, 30c is hot for UK), the bike starts… you get 1/2 mile down in the road and it dies. Not getting fuel.

The question is what to investigate? Something peculiar to a 30c day that might cause an issue.

Petcock, fuel and vacuum lines were all new last year.

2T oracles will eventually cease to exist - keen to figure this out before it's too late. 😜

Setup:
Malossi cast iron 68cc kit.
Technigas silent pro (derestricted).
Dellortro 17.5mm clone carb. A22 needle. MJ is somewhere in the 70s (can't remember).
Manual choke.
Lighter clutch (revs quicker, engages later).
5.7g rollers.
@fleece avatar
UTC

Ossessionato
1991 Vespa T5 Pole Position, 2008 Vespa S 125, 2023 Piaggio MP3 300HPE Sport
Joined: UTC
Posts: 4198
Location: Staffordshire England
 
Ossessionato
@fleece avatar
1991 Vespa T5 Pole Position, 2008 Vespa S 125, 2023 Piaggio MP3 300HPE Sport
Joined: UTC
Posts: 4198
Location: Staffordshire England
UTC quote
sorry, can't help with the problem, but hope for your sake that it is a 30c peculiarity..
Quote:
Sunday became the seventh consecutive day of 30 degree weather in the UK with 32.5C recorded in Cambridge. Before that, according to Met Office data, the UK has only had three consecutive days of 30C weather in September on four previous occasions: 1898, 1906, 1911 and 2016
@vespergeezer avatar
UTC

Addicted
GTS300, Cosa LX200
Joined: UTC
Posts: 584
Location: Sunny South West UK
 
Addicted
@vespergeezer avatar
GTS300, Cosa LX200
Joined: UTC
Posts: 584
Location: Sunny South West UK
UTC quote
Is there a breather hole in the fuel cap that's blocked? Probably not, but easy enough to have a look.
If it does it again, unscrew the cap and see if there's an inrush of air into the tank. (Although I don't think the UK will see 30 deg C till next year!)
@jakem avatar
UTC

Addicted
Vespa Sprint Sport S 125cc
Joined: UTC
Posts: 664
Location: Brighton, England
 
Addicted
@jakem avatar
Vespa Sprint Sport S 125cc
Joined: UTC
Posts: 664
Location: Brighton, England
UTC quote
Does it immediately restart? For that half a mile, does it ride normally - or does it feel slower?

If it's only happened twice, it might also not be related to temperature - it could just be a coincidence.
UTC

Veni, Vidi, Posti
Joined: UTC
Posts: 7082
Location: Tega Cay, SC
 
Veni, Vidi, Posti
Joined: UTC
Posts: 7082
Location: Tega Cay, SC
UTC quote
What does the plug look like? Is it fouling out?
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