Hi, I have a Vespa 1967 fully restored but just av a problem with the engine cutting out after around 40secs. It runs perfectly when starting. To get the engine running again I have to take the plug out, turn the fuel off and crank it over a few times, then put the plug back in and then again turn the fuel back on and its starts more or less first kick. Anyone know what this could be?? Thanks.
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You have to dissamble the write top part around the handlebars to be able to access the battery compartment behind the clock. Uses a watch battery LR43. Then you replace that. There about 11 screws including the two mirrors you have to remove and 12 electrical plugs you have to unplug. It took me approx an hour to remove everything and access the battery compartment.
I'm not familiar with ET2s but I had a similar problem with a Vespa 100 years ago. After hours of messing about i discovered a bolt had fallen and blocked one of the air inlets on the bottom of the frame. Was fine when i kicked it but when my bum was on the saddle it kinda 'sealed' around the tank area and starved the engine of air. As i say, i don't know about new ET2s but sounds kinda similar symptoms.
on old carbs they have mechanical fule pump. you may need to look into a new one or try pumping the gas a few times while turning it over.
and it means theres fule in the bottem of the carb.... the carb is an atomization chamber for fule. if you have to much fule (ie to rich) your going to have liquid fule at the bottem of the carb. this is bad, you need to lean out the carb bar turning the idle screws the right (12 o-clock to 9 o-clock...) just a bit at a time. and play with it while it's at idle to what you think is a good idea. you can hear it trust me just play around with it.
also look at the throttle advansment lever (it shoot gas in at wide open throttle as to not stall) its conected to your throttle cable.
AND YES IT IS.... your fule will evaporate and fast if don't.