Modern Vespa

On pulling up at a junction on my 1984 px125 dropping the revs to change gear it just dies.. any ideas as its embarrasing having to keep kickstarting...

Pilot jet blocked in the tip?

Idle speed set too low?

Does it also die in neutral?

If the clutch cable isn't adjusted (stretched) it will try to stall in gear at idle.

Ticks over fir so long in neutral when strarted up...

Blocked jet.

Soft seize; are you adding OIL?

Oil is added same time as petrol..exact mix

Strip and clean your carb. You havent stuffed a rag under seat or anything odd?

Nope...

Never a bad idea to pull the carb to bits and give it a thorough cleaning.

I would also add, checking your electrical connections. Clean them up, add some conductive grease and adjust and grease the cables as well. Check and gap plug.

What is state of tank too ? Check corrosion, I've replaced my 1987 tank finally as had constant running issues like this often after fuel been in a week , agitates the rust. Also how old is the fuel? You can spend so much time thinking carb or electrics , but not so much attention to the fact E5 and especially E10 can go off very quickly .

Fuel brand new..E10.. top grade oil..

E5 is what I use on both my scoots. What is the tank condition inside , have you shone torch in it when fuel low? Can you see brown specs on the tank wall? Clean your carb and jets , air filter, dial in your pilot mix screw with throttle stop and get that correct.